Feature/dial support

[MicAu]

Adds stream deck + dial support

The dial action provides the following:

• turn left/right adjusts volume
• turn left/right goes to next or previous track
• dial press plays/pauses
• screen press plays/pauses

I haven't programmed anything in JavaScript in many years.... and this is my first stream deck related code. I've tried following what was already there but i am sure there's many uncaught issues.

May also need a better name besides 'center'.