Implement Dashboard Page

This page is the landing page after you login.

This page is only accessible if you are logged in
Show all your pending applications with state
Show all ongoing thesis where you are added as advisor
Show all thesis where you are added as student
Show all topics where you are added as reviewer
Show your unreviewed applications count (for all thesis where you are a reviewer)
Show upcoming presentations (that are publicly listed) if you are in the student group (which you get after being accepted for a topic)
Show important dates
- Thesis deadline
- Test presentation not scheduled yet but submission already in 1 month
- Thesis submitted but not finished yet (grade / report missing etc)

ls1intum / thesis-track