Pyalarmdotcomajax

* Refactored some TypeDicts into data classes.

1. Major refactor. Lots of breaking changes alongside easier-to-read code structure and performance improvements.
2. Added "Configuration Extensions" data model to let pyalarmdotcomajax modify settings for Alarm.com devices.
3. Added first configuration extension for the Skybell HD video doorbell.
4. Created testing framework and started building tests.

A big thanks to lutzky for beta testing the Skybell enhancement and loaning a development account.

1. Fixed crash when encountering unknown device type with missing permissions.
2. Added more unsupported device types.
3. Refactored. Consolidated similar functions.

No longer tries to log back in when Timeout / Cancelled / ClientError exceptions encountered. Puts control in the hands of the caller.

Promotes important debugging messages to error messages so that these messages are more likely to appear in error logs.

Added debug data property for all entities.