chore: update TypeScript to 6.0.1-rc and adjust package dependencies

- Removed duplicate @typescript-eslint/utils dependency in frontend/package.json
- Updated TypeScript version from 5.9.3 to 6.0.1-rc in frontend/package.json and package.json
- Adjusted ResizeObserver mock to use globalThis in tests
- Modified tsconfig.json and tsconfig.node.json to include empty types array
- Cleaned up package-lock.json to reflect TypeScript version change and updated dev dependencies

frontend/tsconfig.node.json

@@ -1,6 +1,7 @@
 {
   "compilerOptions": {
     "composite": true,
+    "types": [],
     "skipLibCheck": true,
     "module": "ESNext",
     "moduleResolution": "bundler",