* CMake cleanup and simplifications
* Position Independent Code is need for radiolib_native
* Some more cleanup & repair
* Fix SIMU_SRC scope issue
* fix: avoid warnings due to assembler statements from StdPeriph on arm64 native
- Allows the radio main application to start correctly when coming from an app in RAM
- Refactoring of the `UNEXPECTED_SHUTDOWN()` process
- Saves the RTC battery as BACKUP RAM is not needed on normal shutdown
- On PWR OFF on an ALERT, the radio won't show the next alert before shutting down
- Bootloader flashable through the SD Manager