Version v2.1.0+1.21.4

• Tweaked mending behavior. Now, mending will lose effectiveness with use, only resetting when an item is repaired normally.
• Added /item damage (add|get|set) (block|entity) subcommand
• Reworked how degradation components work. Now, it's stored in a list of repair methods mapped to an integer. Example: iron_sword=[unbreakable:degradation{smithing_table:20,grindstone:0}]
• Refactored some more code