feat: implement QuestionBank CRUD with pagination and template query

- Add pagination support to findAll (page, limit query params)
- Add findByTemplateId method to service
- Add GET /by-template/:templateId endpoint to controller
- Service already includes CRUD for QuestionBank and QuestionBankItem

web/App.tsx

@@ -0,0 +1,11 @@
+/**
+ * @deprecated This file is the LEGACY entry point for the original single-page App.
+ * It has been SUPERSEDED by `index.tsx` + the new react-router-dom routing structure.
+ *
+ * The new entry point is: `index.html` → `index.tsx` → `AuthProvider` → `BrowserRouter`
+ *
+ * DO NOT import from this file. It is preserved only as a reference/archive.
+ * Safe to delete once the V2 migration is fully validated.
+ */
+
+export { };