format:format and fix code

backend/src/utils/handleError.ts

@@ -1,8 +1,15 @@
 import { Response, NextFunction } from "express";
 import { Logger } from "../utils/logger";
+
+interface CustomError {
+  name?: string;
+  message: string;
+  success?: boolean;
+}
+
 export default function handleError(
   res: Response,
-  error: any,
+  error: CustomError | unknown,
   message: string,
   next: NextFunction
 ) {