Microapp sdk refactor

[martijnvandermarel]

Also a crownstone-microapp (draft) PR, see here: https://github.com/crownstone/crownstone-microapp/pull/17

Summary of changes

• Before handling request, first handle ack from bluenet. If finishing an interrupt, do not handle request. This was previously a bug.
• Redefine shared enums, structs
• Add a new return type microapp_result_t
• Renaming
  • command to request
  • softInterrupt to interrupt
  • some functions
• Code style
  • More comments
  • Adhere to clang-format-14
  • Rename variables to adhere to code style standards

To do

• TESTING. All examples need to be extensively tested. Preferably on multiple types of hardware.
• Documentation in docs/MICROAPP
• Remove/update outdated docs/README sequence diagrams (now covered by docs/CONTROL_FLOW)
• Check to see if the changes have significant effect for eventual running of multiple microapps in parallel
• Some open TODOs in comments that I don't have a clear answer for yet
• Extra feature: When scanning for BLE advertisements, the minimum RSSI of scans to be passed to the microapp could be determined by the microapp itself rather than be a constant in bluenet. Not necessary, maybe a nice to have.
• Bump version

[martijnvandermarel]

Status update

What still needs to be done

• Testing
• Version bump to 1.0
• Update docs/MICROAPP.md
• Doublecheck edge cases