Added markAll as read for notification

lib/data/services/api/notification_api.dart

@@ -7,7 +7,7 @@ class NotificationApi {
 
 
 
-  static const String markAllAsRead = '/api/v1/notifications';
+  static const String markAllAsRead = '/api/v1/notifications/mark';
   static const String markAsRead = '/api/v1/notifications/mark-as-read';
   static const String tenderApprovalsTender = '/api/v1/notifications';
   static String getTenderApprovalById({required String tenderId}) {

lib/data/services/notification_service.dart

@@ -24,14 +24,15 @@ class NotificationsService {
     return result;
   }
 
-  Future<Result<NotificationResponseModel>> markAllAsRead() async {
-    final result = await _networkManager.makeRequest(
-      NotificationApi.markAllAsRead,
-      method: 'POST',
-      (json) => NotificationResponseModel.fromJson(json),
-    );
-    return result;
-  }
+Future<Result<Map<String, dynamic>>> markAllAsRead() async {
+  final result = await _networkManager.makeRequest(
+    NotificationApi.markAllAsRead,
+    method: 'GET',
+    (json) => json,
+  );
+  return result;
+}
+
 
   Future<Result<NotificationResponseModel>> markAsRead({
     required String notificationId,