External integration - Broadlink: add remote control types (air conditioning, fan, amplifier) and RF

[mutmut]

I am taking over the specific requests from @AlexTrovato in the other topic, which I will close to keep only this request:

@AlexTrovato

1. New types of remote controls in addition to TV: air conditioning/heating (mode, target temperature, ventilation), fan (speed, oscillation), amplifier/soundbar (sources, volume) — with the corresponding Gladys features so that scenes can control them.
2. Compact remote control widget on the dashboard: exactly your need — choose the useful buttons (play, vol+, source, oscillation…) without creating a scene per button.
3. Management of RF 433 MHz (RM pro / RM4 pro) in addition to IR.
4. Import of codes from an existing IR database (type SmartIR) to avoid manual learning button by button.

These tracks had already been identified at the time of the development of the service (points 1, 3 and 4 were in a GitHub backlog, never finalized). With the arrival of external integrations, there may be a great project here for a motivated developer from the community; the widget (point 2) is part of the core of Gladys.