feat: add bulk excel data import functionality

backend/src/routes/importRoutes.js

@@ -0,0 +1,9 @@
+import express from "express";
+import { bulkImportExcelData } from "../controllers/importController.js";
+import jwtAuthMiddleware from "../middleware/auth.js";
+
+const router = express.Router();
+
+router.post("/bulk", jwtAuthMiddleware, bulkImportExcelData);
+
+export default router;