update(c01): add tooling initial draft

Author: thelissimus

haskell-for-rustaceans/src/ch01-01-tooling.md

@@ -1 +1,22 @@
 # Tooling
+
+The Haskell tooling consists basically of the following:
+
+| Tool            | Haskell                   | Rust            |
+| --------------- | ------------------------- | --------------- |
+| Installer       | `ghcup`                   | `rustup`        |
+| Compiler        | `ghc`                     | `rustc`         |
+| Package manager | `cabal`                   | `cargo`         |
+| Language Server | `haskell-language-server` | `rust-analyzer` |
+
+Use [GHCup][ghcup] to install the whole toolchain. You should figure it out pretty easily, it is quite similar to `rustup`
+and works on Windows, MacOS and Linux.
+
+If you are using Linux, avoid using your distribution's package manager, unless
+you are using NixOS.
+
+> **NOTE**: GHCup doesn't work on NixOS. Use the Nix package manager to install the toolchain. Refer to the
+> [Haskell][nixos-wiki-haskell] page on NixOS Wiki for further information.
+
+[ghcup]: https://www.haskell.org/ghcup/
+[nixos-wiki-haskell]: https://nixos.wiki/wiki/Haskell