💻 Improvements to Teacher's Dashboard

[jpelay]

This PR improves the dashboard in several aspects:

1. Responsiveness: If you try to use the dashboard from a mobile phone, it will appear like this: the buttons are way too big, the first row is crammed, and the graph looks weird.

This is how it looks now:

2. Adds a new table for student's information, and also I moved the Actions buttons there, leaving the adventure table only for ticking the checkmarks. I think that cramming everything into a single table would've been a lot harder and clumsier.

3. Since I'm adding another table, and to avoid confusion, I added a little explanation on top of each one, so teachers can know the reason for having two of them.

4. The delete student button deleted the student, but you had to manually recharge the page to make the changes visible. Now each time you delete a student we use HTMX to reload the tables and the graph.

Fixes #4243
Fixes #5702

[mergify]

Thank you for contributing! Your pull request is now going on the merge train (choo choo! Do not click update from main anymore, and be sure to allow changes to be pushed to your fork).

[mergify]

Thank you for contributing! Your pull request is now going on the merge train (choo choo! Do not click update from main anymore, and be sure to allow changes to be pushed to your fork).