Added support of bluetooth remote G20BTS PRO to my Volumio on RPI4

I’m sorry, I don’t know how to do all that. Thank you for all the help.
I don’t see a way forward, I checked everything and I don’t see anything wrong.
just doesn’t work. unless I’m suppose to have a screen installed. Could the problem be key codes? never did any changes there…

Anyways, I got triggerhappy working with this remote!!! so yeah. just started playing with it. but it looks like i can do what I want!