Gholdengo Cosmetic Trims - fixed build

Minecraft: 1.21.1
Cobblemon: 1.7.x

FIXES
- Uses a unique additive Gholdengo resolver instead of replacing Cobblemon's 0_gholdengo_base.json.
- Correctly declares both the 1.21.1 resource-pack format (34) and datapack format (48).
- Removes duplicated Type Gem entries from tumblestones.json.
- Removes an unused, unreferenced model file.
- Normalizes and validates all JSON files and archive paths.

INSTALLATION
1. Recommended: put the .jar version directly in the mods folder on both client and server.
2. Pack version: use this same ZIP in the world's datapacks folder and the client's resourcepacks folder.

The mod JAR contains no executable code; it exposes the data and client assets through Fabric/NeoForge mod metadata.
