reorder file structure

Frontend/lib/mih_objects/notification.dart

@@ -1,43 +0,0 @@
-class MIHNotification {
-  final int idnotifications;
-  final String app_id;
-  final String notification_message;
-  final String notification_read;
-  final String action_path;
-  final String insert_date;
-  final String notification_type;
-
-  const MIHNotification({
-    required this.idnotifications,
-    required this.app_id,
-    required this.notification_message,
-    required this.notification_read,
-    required this.action_path,
-    required this.insert_date,
-    required this.notification_type,
-  });
-
-  factory MIHNotification.fromJson(Map<String, dynamic> json) {
-    return switch (json) {
-      {
-        "idnotifications": int idnotifications,
-        "app_id": String app_id,
-        "notification_message": String notification_message,
-        "notification_read": String notification_read,
-        "action_path": String action_path,
-        "insert_date": String insert_date,
-        "notification_type": String notification_type,
-      } =>
-        MIHNotification(
-          idnotifications: idnotifications,
-          app_id: app_id,
-          notification_message: notification_message,
-          notification_read: notification_read,
-          action_path: action_path,
-          insert_date: insert_date,
-          notification_type: notification_type,
-        ),
-      _ => throw const FormatException('Failed to load Notifications.'),
-    };
-  }
-}