Realms Reborn Data Pack

Changes
- Changed recipes for uncrafting chiseled copper, copper doors, copper trap doors, copper grates, iron doors, and iron trapdoors into ingots to now be smelting recipes instead of being crafting recipes. Lightning rods can now be smelted into an ingot too.
- Iron doors, iron trapdoors, minecarts, cauldrons, hoppers, and iron horse armor can now be smelted into iron ingots.
- Golden horse armor can now be smelted into a gold ingot.
- Chains, buckets, shears, heavy weighted pressure plates, and iron bars can now be smelted into iron nuggets.
- Light weighted pressure plates can be smelted into gold nuggets.
- Added recipe for dying cut sandstone into red sandstone.
- Fixed some recipe advancements.

I had to split 1.21.1 and 1.21.2+ because of incompatibilities I found.