[1] Fixed coloured team names breaking the team completely. If a team got created with colour codes in its name (like &eVelix), nobody could accept invites to it or look it up, /team accept Velix and /team info Velix just said "team not found", because the plugin was matching against the full coloured name instead of the plain text. Team names are now stored as plain text (which is what the name was always meant to be, colour belongs on the tag and /team setcolor), and every lookup, invite, ally request and admin command matches on the plain name. Teams that were already created with colours are findable again by typing the normal name.

[2] The allow_formatting_codes setting in config.yml actually works now. It was being read from the wrong place so it was always treated as on, which is how colored names slipped in even with it set to false. Set it to false and colour codes in names are rejected on creation like they should be.

[3] /team rename had the same problem, it would save a coloured name and then you couldn't find the team. It saves the plain name now and updates the cache so the team is immediately findable under the new name.

[4] Fixed a possible crash/desync around team invites on Folia. Invites are tracked in a list that could be touched by two threads at once (a cross-server invite arriving while you accept/deny one), which could throw or lose an invite. That list is thread-safe now.

[5] Built and tested on Paper 1.21.11, and went over every place a team is looked up by name to make sure none of them can hit this bug again.
For server admins: drop the new JAR in and restart, nothing to change. Existing teams (including ones with coloured names) keep working.