Exercises and lectures can now be viewed and created on web.

[SlovenlyTF]

Description

Exercises and lectures can now be viewed and created on web.

Changes

• Removed old section edit page
• Made it a lot smoother when workling on creating or editing a course
• CreateLecture component is now accessible from the new section page
  • Can now also be used to edit existing lectures
• CreateExcersise component is now accessible from the new section page
  • Can now also be used to edit existing excersises
• Now uses the actual token everywhere. (There were some dummy tokens left here and there before)
• Can now sort the sections, exercises, and lectures even after they've been created.

Checklist

• [x] Code has been tested locally and passes all relevant tests.
• [x] Documentation has been updated to reflect the changes, if applicable.
• [x] Code follows the established coding style and guidelines of the project.
• [x] All new and existing tests related to the changes have passed.
• [x] Any necessary dependencies or new packages have been properly documented.
• [x] Pull request title and description are clear and descriptive.
• [x] Reviewers have been assigned to the pull request.
• [x] Any potential security implications have been considered and addressed.
• [x] Performance impact of the changes has been evaluated, if relevant.

If mobile/frontend pull request, what version of the backend is it stable, and running on?

Branch: VT-Magby

Commit id: 79dd0079740a923c3784f275a0cdcc7978e9cbf0

Newest version of VT-Magby as of writing this, tho there should be a PR for it in less than an hour

Notes for Reviewers

There isn't any test (cyprees and otherwise)... We know, we really want to make them, but it was an incredebly tight schedule to get this one done. We've testet locally and everything is working, though we would've liked to have had some test if we had a day or so more.