Add usermode to control Wiz lights

[eibanez]

Hello! I just wrote and tested this usermod, which enables WLED to control Wiz lights. This is done by replicating the UDP API. I included a small README in the pull request, which I'm copying below for your reading pleasure ;)

Happy to answer any questions!

Controlling Wiz lights

This usermod allows the control of WiZ lights that are in the same network as the WLED controller.

The mod takes the colors from the first few pixels and sends them to the lights.

Configuration

First, enter how often the data will be sent to the lights (in ms).

Then enter the IPs for the lights to be controlled, in order. There is currently a limit of 10 devices that can be controled, but that number
can be easily changed by updating MAX_WIZ_LIGHTS.

[eibanez]

Thanks!