fix(entity): state transitions support users configurations

[palazzem]

Related Issues

• Closes UI bug when arming night sector after arming home away #24

Proposed Changes:

This change introduces AlarmDevice.get_state() that maps activated sectors with HA compatible states. If users configure the integration to set ALARM_HOME = [3, 4], the state is set to HOME if sectors 3 and 4 are armed.

The transition happens immediately after the command is triggered, and when the AlarmDevice updates its state through the update() call.

Testing:

• Instant transitions through entity decorator are tested
• AlarmDevice states mapping are tested

To test this PR, configure a alarm home and night options, then enable alarm home and then switch to night.

Extra Notes (optional):

Some refactoring has been done to organize better the changes.

Checklist

• Related issues and proposed changes are filled
• Tests are defining the correct and expected behavior
• Code is well-documented via docstrings