Update Vite configuration to enhance dependency optimization and build settings

- Added 'three' and its GLTFLoader to the optimizeDeps include array for improved module resolution.
- Introduced custom Rollup options to prevent externalization of the 'three' library during the build process.
- Configured CommonJS options to include 'three' and node_modules for better compatibility with dependencies.

frontend/vite.config.js

@@ -33,6 +33,7 @@ export default defineConfig(({ mode }) => {
             })
         },
         optimizeDeps: {
+            include: ['three', 'three/examples/jsm/loaders/GLTFLoader.js'],
             esbuildOptions: {
                 plugins: [
                     NodeGlobalsPolyfillPlugin({
@@ -50,5 +51,16 @@ export default defineConfig(({ mode }) => {
                 assert: 'assert',
             }
         },
+        build: {
+            rollupOptions: {
+                output: {
+                    // Stelle sicher, dass three nicht externalisiert wird
+                    manualChunks: undefined
+                }
+            },
+            commonjsOptions: {
+                include: [/three/, /node_modules/]
+            }
+        },
     };
 });