Aa-srp

Cleanup

- Grammar in comments fixed
- Commented and no longer used code removed
- Code cleaned up in general

Changed

- Always serve JS and CSS locally (GDPR)
- Functions to check if an additional module is installed have been renamed to
something that makes more sense
- Optimized notification helper to send Discord messages
- Minimum requirements
- Python (>= 3.8)

Fixed

- Notifications to Discord when using `allianceauth-discordbot`

Fixed

- AttributeError exception in `get_main_character_from_user` when the user doesn't
have a main character anymore
- Possible RelatedObjectDoesNotExist error in `get_main_for_character`
- Possible RelatedObjectDoesNotExist error in `get_user_for_character`

Changed

- Logic for Discord PMs changed/optimized. We now check if the user has a
Discord account registered with Alliance Auth first, so we don't have to do all
the other checks if the user doesn't

Fixed

- EveCharacter has no userprofile (62)

Changed

- HTML for an ajax call result moved to its own template

Fixed

- Reverted JS arrow function back to a normal function, since we need `$(this)` here

Added

- Test suite for AA 3.x and Django 4

Changed

- Switched to `setup.cfg` as config file, since `setup.py` is deprecated now

Removed

- Deprecated settings