Add auto/manual mode switch for comfoconnect

Zehnder comfoconnect can be set into auto or manual modes. Please add a switch input to change this mode or read the current setting. This is supported by underlying pycomfoconnect lib. Please see values CMD_MODE_AUTO and CMD_MODE_MANUAL in const.py

I would also appreciate this feature

See Zehnder ComfoConnect component - #82 by michaelarnauts