feat: Better comments section

[yammesicka]

TODO:

• Fix RTL languages alignment (Can we find a good md parser that actually solves this? Two birds one stone)
• Think of a good way to pass date+times (prolly ISO-8601), parse in JS, put both as formatted text and on tag
• Do some more small finishes (can we get it a bit smaller? Maybe the avatar should be on the inline-start and only name & date in the top?)
• Remove old tooltip logic
• Change backend /comments?act=fetch&fileId=ID logic to support avatars
• Add new comments section logic to the frontend
• Support deleting the comments
• Fix: Adding a new comment looks strange.
• Fix: No migration for changing linter mail.

Editing will follow the creation of the new md editor for adding new comments

[codecov]

Codecov Report

Attention: Patch coverage is 80.35714% with 11 lines in your changes are missing coverage. Please review.

Project coverage is 80.20%. Comparing base (f982fec) to head (a3acd78).

Files	Patch %	Lines
lms/lmsdb/bootstrap.py	8.33%	11 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #366      +/-   ##
==========================================
+ Coverage   80.12%   80.20%   +0.08%     
==========================================
  Files          63       63              
  Lines        2953     2996      +43     
==========================================
+ Hits         2366     2403      +37     
- Misses        587      593       +6     

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