WeatherFlowCloud: Add Luminance Sensor from API

It would be great if the WeatherFlowCloud integration had a luminance/brightness/lux sensor exposed from the WeatherFlow API. It looks like it is unavailable as the second item for Sky observations from GET /observations/device/{device_id}.

Thank you!

P.S.: I know it is available on the local integration but my current setup isn’t working with the UDP broadcasting. And FWIW I’m not the only one.