Add examples for ThingStream cloud provider

[bvernham]

It is possible to create and example to connect to the u-blox ThingStream PointPerfect service like:

https://github.com/sparkfun/SparkFun_u-blox_GNSS_Arduino_Library/tree/main/examples/ZED-F9P/Example18_PointPerfectClient

Please add examples for connecting to this service using Arduino boards (e.g., MKR WiFi 1010, MKR NB 1500).