Support patterns on v2 microphones

[mweinelt]

It should be possible to provide a variety of effects using a higher level API like HermesLEDProject does.

https://github.com/project-alice-assistant/HermesLedControl/blob/master/interfaces/respeakerMicArrayV2.py

I was using their Google pattern together with Rhasspy, but with the move to Mycroft I'm stuck with what is offered in the firmware.

Is that something we can reasonably expect to be supported in pixel_ring?