Tag Game v1.0.0

For 1.21.1, 1.21.0

Main differences from Vanilla Tweaks:

• A tagger taking thorns damage doesn't tag themself
• If there are multiple taggers, they each have their own cooldown
• Tags are only removed from the tagger who tagged another player,
  not from any other taggers
• Only the admin can change settings for the cooldown and tag announcements
• When a tagger is still under cooldown, attempting to tag a player will
  show the tagger how long they have left on their cooldown