1056: embassy-nrf: Add TWIS module r=Dirbaio a=kalkyl
Verified to be working on nrf9160
Co-authored-by: kalkyl <henrik.alser@me.com>
Co-authored-by: Henrik Alsér <henrik.alser@me.com>
- Move Interrupt and InterruptExecutor from `embassy` to `embassy-cortex-m`.
- Move Unborrow from `embassy` to `embassy-hal-common` (nothing in `embassy` requires it anymore)
- Move PeripheralMutex from `embassy-hal-common` to `embassy-cortex-m`.