Upgrade `wled` library, use websockets for state

[cp2004]

The python-wled library currently vendored doesn't support websockets, which could be used to get updates from WLED when turned on/off for example.

This is hard because the current version of the library only supports Python 3.9 and 3.10. I need to support at minimum 3.7... So some work will still have to be done. It's also not direct drop in as I don't use it asynchronously. I would like to do so at some point.