feat: add gfanton nebular 2024 (#57)

Signed-off-by: gfanton <8671905+gfanton@users.noreply.github.com>

Author: gfanton

presentations/2024-07-13--nebular--gfanton/.gitattributes

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+*.gno linguist-language=Go
+

presentations/2024-07-13--nebular--gfanton/.gitignore

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+gno/

presentations/2024-07-13--nebular--gfanton/.gitpod.yml

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+# http://gitpod.io/#github.com/gnolang/getting-started-workshop
+
+additionalRepositories:
+  - url: https://github.com/gfanton/gno
+    checkoutLocation: gno
+
+tasks:
+  - name: Gno Deps
+    env:
+      GNO_ROOT: '../gno'
+    before: echo "alias gnodev='gnodev -web-remote=$(gp url 8888)'" >> $HOME/.bashrc
+    init: make deps
+    command: source $HOME/.bashrc
+
+ports:
+  - name: gnoweb
+    description: "the Gno.land web server"
+    port: 8888
+    onOpen: open-preview
+
+  - name: "gnodev RPC"
+    description: "the RPC server, managed by tendermint2"
+    port: 26657
+    onOpen: ignore
+
+github:
+  prebuilds:
+    master: true
+    branches: true
+    pullRequests: true
+    pullRequestsFromForks: true
+    addCheck: true
+    addComment: true
+    addBadge: true
+
+vscode:
+  extensions:
+    - harry-hov.gno

presentations/2024-07-13--nebular--gfanton/01_gno/README.md

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+## 01_Gno - Go, little brother
+
+In this section, you will learn to use the `gno` CLI to run and test Gno packages. This part does not rely on a blockchain; instead, it operates solely on the GnoVM.
+
+### Package
+
+A GNO package is generally composed of:
+
+* a `gno.mod` file that describes the package and its dependencies
+* some `*.gno` files (and optionally some `*_test.gno` files for testing)
+* an optional `README.md`
+
+Explore the different files in the current package (in the same folder as this README).
+
+### Run Gno Package
+To execute your package, run the following command from the directory containing the package:
+
+```bash
+$ gno run .
+```
+
+This command runs the `main()` function in the `main.gno` file, which serves as the entry point of the package.
+
+### Testing Gno Packages
+Run tests using the `gno test .` command. This command executes all functions prefixed with `Test` in files that are suffixed with `_test.gno`.
+
+```bash
+$ gno test .
+```

presentations/2024-07-13--nebular--gfanton/01_gno/gno.mod

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+module gno.land/r/nebular24/gno

presentations/2024-07-13--nebular--gfanton/01_gno/main.gno

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+package main
+
+func Sum(a int, b int) int {
+	return a + b
+}
+
+func main() {
+	val := Sum(2, 3)
+	println("sum of value:", val)
+}

presentations/2024-07-13--nebular--gfanton/01_gno/sum_test.gno

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+package main
+
+import "testing"
+
+func TestSum(t *testing.T) {
+	const expected = 3
+
+	actual := Sum(1, 2)
+	if actual != expected {
+		t.Fatalf("invalid result, expecting %d got %d", expected, actual)
+	}
+}

presentations/2024-07-13--nebular--gfanton/02_gnodev/README.md

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+## 02_Gnodev - Debuging and Rendering
+
+`gnodev` is a Gno development tool to works on the Gno package. It embeds a fully functional `gnoland` node (blockchain), along with `gnoweb`, a web server used to explore and visualize the `gnoland` realm.
+
+By watching your development directory, `gnodev` detects changes in your Gno code and reflects them in the state of the node immediately. `gnodev` also runs a local instance of `gnoweb`, allowing you to see the rendering of your Gno code instantly.
+
+### Start gnodev
+
+To start `gnodev` on a given package, simply use the command `gnodev <pkg_path>`.
+
+To start gnodev with the package located in this folder, use:
+```bash
+$ gnodev ./02_gnodev
+```
+
+> You can exit `gnodev` at any time using `Ctrl+C`.
+
+### Gnoweb
+
+`gnodev` will automatically serve `gnoweb` (by default on `:8888`).
+
+> In this demo, if you are using gitpod, a browser tab will open on `gnoweb` when running `gnodev`
+
+- On a local machine you should be able to accesse `gnoweb` in your browser with http://localhost:8888.
+- If you are using gitpod, you can retreive `gnoweb` url by typing `gp url 8888` in your terminal session
+
+### Access Your Realm
+
+You can then access your realm by reaching `http://<gnoweb_url>/<module_path>` url.
+
+So for the realm (package) located in the same directory as this `README`, it will be:
+-  `http://localhost:8888/r/nebular24/gnodev` in case of gnodev running locally on your machine 
+-  `$(gp url 8888)/r/nubular24/gnodev` in case of gnodev running on gitpod

presentations/2024-07-13--nebular--gfanton/02_gnodev/gno.mod

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+module gno.land/r/nebular24/gnodev

presentations/2024-07-13--nebular--gfanton/02_gnodev/render.gno

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+package render
+
+var bodyPage = `
+# My Gno Realm
+
+### Realms in short:
+
+* Smart contracts in Gno.
+* Realms are stateful.
+* Realms can own assets (tokens).
+* Realms can implement ` + "`" + `Render(path string) string` + "`" + `
+  to simplify dapp frontend development by allowing users to request
+  markdown renderings from validators and full nodes without a transaction.
+
+### Path
+
+The Render function takes a path argument that can impact its behavior. In
+'gnoweb', this argument can be passed by adding ` + "`" + `:<path>` + "`" + ` after the URL.
+
+*Try it, go to [/r/nebular24/gnodev:page-2](/r/nebular24/gnodev:page-2)*
+
+`
+
+func Render(path string) string {
+	view := bodyPage
+
+	if path != "" {
+		view += "---\n"
+		view += "### " + path + "\n"
+	}
+
+	return view
+}

presentations/2024-07-13--nebular--gfanton/03_gnokey/README.md

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+## Bring Your Realm to Life with Gnokey
+
+`gnokey` is a command-line tool for interacting with a blockchain node. It allows you to make blockchain transactions, publish new packages, and perform various operations with a remote or local blockchain node.
+
+### Create an Account
+
+To create an account, simply type:
+
+```
+$ gnokey add mykeyname
+```
+__Replace `mykeyname` with the desired name for your key.__
+
+You will be prompted to enter a password to secure your key. It is strongly recommended to use a password, as using the key without one is not advisable outside of this workshop.
+
+You can then verify that your key has been correctly added to the keybase by typing:
+
+```
+$ gnokey list
+```
+
+This should correctly display your newly created key.
+
+### Start gnodev
+
+As in the previous exercise, start `gnodev` target this directory by typing
+
+```
+$ gnodev ./03_gnokey
+```
+
+To load the `counter` package on `gno.land/r/nebular24/gnokey`
+
+`gnodev` should automatically load the key you just created. You can verify this
+by pressing `A` within `gnodev` to display all known accounts and their
+balances. 
+
+In `gnodev`, your account should have been premined with enough tokens
+to do whatever you want.
+
+### Interact with the contract
+
+You can then interact with the realm using the `maketx call` command from gnokey
+
+```
+$ gnokey maketx call \
+	-pkgpath "gno.land/r/nebular24/gnokey" \
+	-func "Inc" \
+	-gas-fee 1ugnot \
+	-gas-wanted 2000000 \
+	-broadcast \
+	-chainid "dev" \
+	-remote "127.0.0.1:26657" mykeyname
+```
+__Replace `mykeyname` with your key.__
+
+
+

presentations/2024-07-13--nebular--gfanton/03_gnokey/counter.gno

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+package counter
+
+import (
+	"strconv"
+)
+
+var count int
+
+func Inc() {
+	count += 1
+}
+
+func Add(value int) {
+	count += value
+}
+
+func Render(path string) string {
+	view := "# My Super Counter \n"
+	view += "* my counter is: " + strconv.Itoa(count)
+	return view
+}

presentations/2024-07-13--nebular--gfanton/03_gnokey/gno.mod

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+module gno.land/r/nebular24/gnokey

presentations/2024-07-13--nebular--gfanton/04_gnoland/README.md

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+## 04_GnoLand - Publish Your Realm on Gno.Land
+
+`Gno.Land` is the platform where you can upload your contract and make it available to the world, on-chain. When publishing on `Gno.Land`, there is no rollback or hot reload. Your contract will remain there permanently, so be cautious when choosing the package path to publish your realm.
+
+### Faucet Hub
+
+Unlike `gnodev`, you don't have any tokens to interact with the chain (yet). Let's get some for your key on the `Faucet Hub`.
+
+1. Go to https://faucet.gno.land and select `Portal Loop`.
+2. Enter the wallet address you created in the previous section (use `gnokey list` to retrieve the key address).
+3. Select the faucet amount and click on `Request Drip`.
+
+Your address should now have received some tokens!
+
+You can verify your current balance by running:
+```bash
+$ gnokey query --remote https://rpc.gno.land bank/balances/<wallet_address>
+```
+> wallet address should be in the form `g1xxxx...`
+
+This command should display the current amount of `ugnot` you possess in your wallet.
+
+### Publish
+
+Now, it's time to upload your first package. We'll upload the package inside `04_gnoland`.
+
+1. Choose a package path name. It's recommended to use your address as the namespace for your contract:
+    * Example: `gno.land/r/g1hr3dl82edy84a5f3dmchh0due7zgwm5rnns6na/myrealm`
+2. Run the following command to publish the package on `gno.land`:
+```bash
+$ gnokey maketx addpkg "<MY_KEY_NAME>" \
+    -pkgpath "<PKG_PATH_NAME>" \
+    -pkgdir "<LOCAL_PKG_DIR>" \
+    -gas-fee 1ugnot \
+    -gas-wanted 10000000 \
+    -broadcast \
+    -chainid portal-loop \
+    -remote https://rpc.gno.land
+
+# * `MY_KEY_NAME`: the name of your key used in the gnokey section; use `gnokey list` to retrieve it.
+# * `LOCAL_PKG_DIR`: the local directory containing the realm (package) you want to publish.
+# * `PKG_PATH_NAME`: the package path name you chose in step 1.
+# * You will be prompted for your key password.
+```
+3. Visit your realm on `gno.land` using the package path you chose in step 1.
+    * Example: `https://gno.land/r/g1hr3dl82edy84a5f3dmchh0due7zgwm5rnns6na/myrealm`
+
+### BONUS: Gno Bro
+
+There are many ways to explore realms. Try running:
+```bash
+$ ssh bro.gno.cool
+```
+
+This will bring you to a terminal-based version of `gno.land`, where you can fetch the previously published realm by typing its path. Enjoy the magic!

presentations/2024-07-13--nebular--gfanton/04_gnoland/gno.mod

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+module gno.land/r/nebular24/guessbook