* Remove unavailable and EOLed target boards - STM32
* Make CI detect any missing MCU descriptions
* Oops fix CI syntax
* Aaand add those MCUs
* Also remove "orphaned" cellular modem COMPONENTs
* Various updates to support targets & drivers site generation
* Add regression test for python code, add links to README
* Don't need to duplicate device_name
* Fix typo and some extra commas
* Rephrase docs