feat: Add DaSCH contact information somewhere in the logged-in part

[flavens]

Is your feature request related to a problem? Please describe.
There is a section with DaSCH contact information in the footer of the logged-out homepage but there is nothing in the logged-in part.

Describe the solution you'd like
Contact information should be added on the dashboard or in the user menu > tab e.g."Need help" or "Contact DaSCH" or something equivalent.

Describe alternatives you've considered
Contact form.

Additional context
N.A.

[kilchenmann]

Good point