Audio Driver support

[ewowi]

MoonLight connected to microphone or line in, processing audio data and store the results (frequency bands, volume, ...) in shared data.

Instead of wled sync receive

Created audio-driver branch:
Audio driver is setup - no audio processing code added yet.
See b73fb1d

UI:

See Developer quick start guide turtorial on Youtube about MoonLight nodes (the audio driver is a driver node).

Notes:

• The audio driver implementation should not occupy memory before the audio driver node is created. If the audio driver node is deleted, it's memory and tasks should also be deleted (see node setup and node destructor)