Factor for re-use

[jordens]

There are a couple of components that we duplicate (i.e. copy) across devices (stabilizer, thermostat-eem, booster, thermostat-mqtt). That makes maintenance harder. Let's evaluate factoring them out into their own crate(s) or upstreaming them somewhere

• https://github.com/quartiq/stabilizer/blob/main/src/settings.rs -> crate
• https://github.com/quartiq/stabilizer/blob/main/src/hardware/delay.rs -> ?
• https://github.com/quartiq/stabilizer/blob/main/src/hardware/eeprom.rs -> new/existing crate?
• src/hardware/flash.rs -> hal #945
• https://github.com/quartiq/stabilizer/blob/main/src/hardware/signal_generator.rs -> idsp/own crate
• https://github.com/quartiq/stabilizer/blob/main/src/hardware/setup.rs
  • ITCM setup -> hal
  • DFU boot -> hal
  • best effort rtt -> crate, also since rtt-target broke API (build(deps): bump rtt-target from 0.3.1 to 0.5.0 #835 etc)
• https://github.com/quartiq/stabilizer/blob/main/src/net/data_stream.rs -> crate
• https://github.com/quartiq/stabilizer/blob/main/src/net/telemetry.rs -> crate