v0.3.0 - favourites + console temp + dropout fix (preview)

Preview / soak-test release of the AirTouch 2+ integration fork.

Included:

• Fixes the "becomes unavailable / stops responding" dropouts by acknowledging the controller's undocumented 0x2B/0x45 status broadcasts.
• New: Favourite (scene) select entity - shows the active favourite and switches favourites.
• New: Console (touchscreen) temperature sensor(s).

Pulls the forked airtouch2 library (feat/at2plus-favourites) via the manifest.
Preview for testing before upstreaming - enable debug logging for airtouch2 and custom_components.airtouch2plus to help verify.