* initial work on alarm
* final work on alarm
* coveragerc
* add tests
* add code validation
* remove sensor changes for a dedicated PR
* code optimization and cleanup
* tweaks
* tweak #2
* apply suggestion
* code quality
* code quality #2
* fix cover.py
* api typing
* use base classes where possibile
* apply const as per review comment
* cleanup unload entry
* apply review comments
Simone Chemelli