Expose button entities to trigger/abort listening

[visualglitch91]

Hey there, would it be possible to expose button entities to trigger and abort listening? Would the project be open to a pull request or is this out of scope?

[imonlinux]

I have a fork of this project that include the implementation of the GPIO button with an extensive tutorial. Currently assumes the ReSpeaker 2-Mic Pi Hat button (17), but it is configurable to any GPIO.

https://github.com/imonlinux/linux-voice-assistant