Track active user sessions

### Describe the problem

Currently, a user cannot see what all his active sessions are and cannot terminate inactive ones. The active sessions should be tracked and allow termination in the user profile.

### Solution brainstorm

The sessions can be tracked per user to allow listing in the user profile and terminating individual sessions.

### Describe alternatives you have considered

* https://github.com/QueraTeam/django-qsessions
* https://github.com/jazzband/django-user-sessions (seems unmaintained)
* https://gavinballard.com/associating-django-users-sessions/ (manual tracking outside the session engine)

### Screenshots

_No response_

### Additional context

Allowing users to terminate sessions might increase security in case of device theft (but the question is how many users will remember doing this for Weblate).