feat(datapacks): add ironchest recipes and datapack sync automation

- Add crafting recipes for copper, iron, gold, and diamond chests using IronChest mod
- Remove vanilla copper chest recipe to prevent conflicts
- Introduce `.env.example` for local world configuration
- Add `bash/sync-datapacks-to-world.sh` script to mirror datapacks to Minecraft world saves
  - Supports one-time sync and watch mode for real-time updates
  - Uses `rsync` for efficient file synchronization

.env.example

@@ -0,0 +1,2 @@
+# Локальный мир для синхронизации datapacks (bash/sync-datapacks-to-world.sh)
+LOCAL_WORLD="Новый мир"