Add support for some gltf extensions and better multi-object updates

vite.config.ts

@@ -28,7 +28,7 @@ export default defineConfig({
     build: {
         assetsDir: '.',
         cssCodeSplit: false, // Small enough to inline
-        chunkSizeWarningLimit: 550, // Three.js is huge
+        chunkSizeWarningLimit: 550, // Three.js is big. Draco is even bigger but not likely to be used.
     },
     define: {
         __APP_NAME__: JSON.stringify(name),