As a volunteer I want to be able to view group information

On the programs page, people should be able to view all programs as listed in #5 and for the enrolled programs there should be a group information button. This should redirect to a program information view where they can look at relevant information.

**Tasks**

Frontend
- [ ] Program information page
- for the programs list created in #5, if they are enrolled in the program then display a information button instead of apply
- this buttons lead to an information page that list the available description with tabs for that specific program (fetched from backend)

Backend
- [ ] Program information endpoint
- GET request, given a group id, return all relevant information about the group (to be elaborated on by client)
- if the user is not enrolled in the group, reject the request