Easier porting to other architectures

[stevefan1999-personal]

Despite I know ESP32-C3/C2 is magnitude slower than nRF52840, but I want to port this there. Right now OpenSK seems like very centric to nRF52840, but I guess this can be traded with time. There is one thing about ESP32-C3/C2 though, that they don't have official atomic support, and I believe changing it to use atomic_polyfill can have some, say like timing consequences. Wonder if we can make something relaxed so we can port things easier?