Add support for direct command response instead of event

[lnx85]

As discussed in home-assistant/core#117697, it will be a good idea to make commands respond directly instead of triggering a new event on event_bus.

Any suggest?

[lnx85]

Based on how commands are executed with the current version of the library, my approach will probably be:

1. add a method "execute_with_response" or something similar that execute the command and return the response instead of handling asyncrounusly;
2. add a method "execute_command_with_response" in the device class as a wrapper for the previous point.

This will guarantee that the library will work in both ways.

@edenhaus What do you think about this flow?

[edenhaus]

I would keep the event handling for any command as it is.
I would add a param to execute instead, indicating whether the response is requested or not.

This has the advantage that the entities will also be updated if a user executes a command that has entities for it.

[lnx85]

Implemented in #513