state attributes lack spinning speed + finishTime slightly incorrect

[shortibln]

Over in the file sensor.py the spinning speed is missing within the state attributes.
Further the calculated finishTime seems to be incorrect, whenever a startTime (offset) is set.
I'd like to contribute with the necessary changes - is this a welcome contribution right now?

[slootjes]

There seem to be more attributes that are available in the miele@home app but not in HA right now; for instance the use of cooking top (location, level). Also curious how I can contribute to get this added.

[kloknibor]

A complete list can be found here : https://www.miele.com/developer/swagger-ui/index.html#/Information/get_devices if there are any specific ones you would like please let me know and i can add them into my fork over at : https://github.com/HomeAssistant-Mods/home-assistant-miele