feat: integrate Draco compression for GLB models and implement encryption for secure loading

- Added DRACOLoader to starter.js for handling compressed GLB models.
- Created a createGltfLoader function to initialize GLTFLoader with DRACOLoader.
- Implemented dracoModels plugin in vite.config.js to compress GLB models during build.
- Introduced model_loader.js for loading encrypted GLB models with WebCrypto.
- Developed encryptModels plugin to encrypt GLB files, ensuring no clear models are exposed.
- Updated asset handling to remove uncompressed GLB files post-build.

package.json

@@ -22,6 +22,10 @@
     "vite-plugin-static-copy": "^2.3.0"
   },
   "devDependencies": {
+    "@gltf-transform/core": "^4.5.1",
+    "@gltf-transform/extensions": "^4.5.1",
+    "@gltf-transform/functions": "^4.5.1",
+    "draco3dgltf": "^1.5.9",
     "vite": "^6.2.4",
     "vite-plugin-minify": "^2.1.0"
   },