Acorn's Tweaks

Updated to game version 1.21.9 and implemented Copper changes that required the Copper Age drop to work. Also fixed some bugs and made other changes that aren't enough to be a full size update.

• The Mace now disables shields for 5 seconds like axes
• Regular Golden Apple Absorption hearts can stack if eaten consecutively, for parity with Bedrock Edition
• The unused element paintings can now only be found in archeology, and only swap to each other with the brush