Feature request: WebSocket client support in toolkit

[justparking]

There are increasingly more devices that support WebSockets to control them (e.g. the WLED project)

It's a protocol that lends itself to Nodel recipes nicely and would make a very handy addition to the Toolkit.

I've been looking at some very lightweight, simple libraries and these two look promising:

1. https://github.com/gusavila92/java-android-websocket-client
2. https://github.com/TooTallNate/Java-WebSocket

Either could be cleanly integrated into Nodel making use of the relevant threading and logging frameworks.