Quests [1.8-1.21] | Set up goals for players

Quests [1.8-1.21] | Set up goals for players -----

Allow your players to do quests in return for rewards

Add sounds & bug fixes

Quests can now play sounds when interacted with
- Code (YAML):
  
  options :
  ...
  sounds:
  quest-start : "ENTITY_PLAYER_LEVELUP:2:3"
  quest-cancel : "UI_TOAST_OUT:2:3"
  quest-complete : "UI_TOAST_CHALLENGE_COMPLETE:1.25:3"
  gui:
  open : "ITEM_BOOK_PAGE_TURN:1:3"
  interact : "ITEM_BOOK_PAGE_TURN1:3"
- See the wiki for more info:
  https://github.com/LMBishop/Quests/wiki/Basic-Options#sounds
Fixed a bug where the plugin would throw an NPE if UI titles, messages etc were not defined in the config
Added JetBrains annotations and more javadoc for developers