Add recipe template JSON files organized by type

[Copilot]

Adds starter recipe templates covering all major Minecraft recipe types, organized into subfolders by type under app/src/main/resources/recipes/.

Structure

recipes/
├── crafting/
│   ├── shaped/example.json        # stone pickaxe (grid pattern)
│   └── shapeless/example.json     # pink dye (red + white)
├── smelting/example.json          # cobblestone → stone
├── blasting/example.json          # iron ore → iron ingot
├── smoking/example.json           # raw beef → cooked beef
├── campfire_cooking/example.json  # raw beef → cooked beef
├── stonecutting/example.json      # cobblestone → slab ×2
└── smithing/example.json          # diamond sword → netherite (smithing_transform)

Each file uses a real, logical vanilla recipe as the example so the format and field semantics are self-evident. Smithing uses the 1.20+ smithing_transform type (matching the 1.20.4 dev server target).