Added

• Added a "Rust Removal" crafting recipe: any Axe can be shapelessly crafted with copper equipment or Copper Ingots to revert it by one oxidation stage. If it is a waxed variant, it reverts to the unwaxed version of the same stage. The Axe is not consumed and does not lose durability.
• Added an "Oxidation" crafting recipe: a Water Bucket can be shapelessly crafted with unwaxed copper equipment or Copper Ingots to advance it by one oxidation stage. The recipe consumes the water and returns one empty Bucket.
• Added two config options to determine whether the "Rust Removal" and "Oxidation" crafting recipes are enabled.
• Added conversion recipes between Blocks of Copper and Copper Ingots: Blocks of Copper at any oxidation or waxed stage can be crafted into 9 Copper Ingots of the same stage, and 9 Copper Ingots of the same stage can be crafted into the corresponding Block of Copper.

Changed

• Oxidized and waxed Copper Swords, Axes, Pickaxes, Shovels, and Hoes are added to the corresponding vanilla tool tags, allowing them to be enchanted normally and count for tool checks.
• Copper Pickaxe variants are added to the Amethyst Cluster mineable tag.
• All Copper Ingot variants are added to the common `c:ingots/copper` tag for recognition by other mods.
• Added four waxed-stage Copper Ingot tags for the Block of Copper/Copper Ingot conversion recipes.
• Armor tag entries are now optional, so missing entries no longer appear when the oxidation mechanic is disabled.