Client side painting variants

Minecraft 1.20.5 & 1.20.6

Added

• Test resource pack included with the mod.
  • For now it only contains a 2x2 painting, but I may add other sizes later.
• Support for both 1.20.5 and 1.20.6
  • Behind the scenes I'm working on dealing with Minecraft updates automatically. This release is a test of part of that process.

Fixed

• Incorrect key for access widener in fabric.mod.json