Make the arming types configurable

[doctorkb]

When looking at the panel entity, I see options for: Home, Away, Night, Vacation, Custom, and Disarmed. Of these, only Home, Away, and Disarmed are relevant -- arming Night, Vacation, or Custom revert to one of the other types.

Ideally, these wouldn't be presented unless they were going to be functional -- this is configurable by the entity (the ADC integration has done that here: https://github.com/pyalarmdotcom/alarmdotcom/blob/master/custom_components/alarmdotcom/alarm_control_panel.py#L90 )

Thanks!