Support for the `stm32` platform #808

Job	Run time
check-diff / check	19s
c-embedded / patmos / Patmos-tests	34m 12s
c-embedded / arduino / arduino-tests (ubuntu-latest)	5m 31s
c-embedded / zephyr / zephyr-tests	39m 31s
	1h 19m 33s

Provide feedback