[Feature Request] Add support for more teacher management features

[linux-lukas]

Describe the solution you'd like A clear and concise description of what you want to happen. In view of the fact that most schools rely on other modules in addition to the timetable (class register, office hours, appointments, etc.), it would be desirable for BetterUntis to support these in order to be able to (continue to) use Untis without a tracker.

Add any other context or screenshots about the feature request here.