cardboard-pet

Added

• Cardboard boxes can now be equipped with armor. Shift + right-click with a helmet, chestplate, leggings, or boots routes it to the matching armor slot regardless of which hand it's held in (armor is not yet reflected visually on the model).
• Two parallel upgrade chains for the cardboard sword, each step crafted from the previous tier's sword plus material:
  • Stone chain: Stone → Iron → Gold → Diamond → Emerald → Netherite
  • Deepslate chain: Deepslate → Obsidian → Crying Obsidian → Sculk (echo shard) → End → Nether Star
  • Blade texture tint and attack damage/durability scale per tier.