Island Menu

Changes

• Rewrote the internals of the mod to break out the main menu replacement to a separate library mod. #13
  • You shouldn't see any major changes because of this. Please let me know if anything looks off!
• Updated the days of the Winter theme to match the Winter event for 2023.
• Removed 1.20.2 support. (See v1.4.1 for 1.20.2 support)