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/services/ocrService.ts

@@ -0,0 +1,24 @@
+import { apiClient } from './apiClient';
+
+/**
+ * OCR Service - Handles image text recognition
+ */
+export const ocrService = {
+    // Recognize text in image
+    async recognizeText(authToken: string, image: Blob): Promise<string> {
+        const formData = new FormData();
+        formData.append('image', image);
+
+        const response = await apiClient.request('/ocr/recognize', {
+            method: 'POST',
+            body: formData,
+        });
+
+        if (!response.ok) {
+            throw new Error('Failed to recognize text');
+        }
+
+        const data = await response.json();
+        return data.text;
+    }
+};