TF-934 Add page not found

lib/main/localizations/app_localizations.dart

@@ -2569,4 +2569,22 @@ class AppLocalizations {
         'Create a rule with this email',
         name: 'quickCreatingRule');
   }
+
+  String get titlePageNotFound {
+    return Intl.message(
+      'Oops, we can’t find that page',
+      name: 'titlePageNotFound');
+  }
+
+  String get subTitlePageNotFound {
+    return Intl.message(
+      'It is possible that your destination page has disappeared or belongs to another account.',
+      name: 'subTitlePageNotFound');
+  }
+
+  String get page404 {
+    return Intl.message(
+        'Page 404',
+        name: 'page404');
+  }
 }

lib/main/pages/app_pages.dart

@@ -25,6 +25,7 @@ import 'package:tmail_ui_user/features/manage_account/presentation/manage_accoun
 import 'package:tmail_ui_user/features/manage_account/presentation/manage_account_dashboard_view.dart' deferred as manage_account_dashboard;
 import 'package:tmail_ui_user/features/session/presentation/session_page_bindings.dart';
 import 'package:tmail_ui_user/features/session/presentation/session_view.dart' deferred as session;
+import 'package:tmail_ui_user/features/unknown_route_page/unknown_route_page_view.dart';
 import 'package:tmail_ui_user/main/pages/deferred_widget.dart';
 import 'package:tmail_ui_user/main/routes/app_routes.dart';
 
@@ -60,6 +61,7 @@ class AppPages {
             manage_account_dashboard.loadLibrary,
             () => manage_account_dashboard.ManageAccountDashBoardView()),
         binding: ManageAccountDashBoardBindings()),
+    unknownRoutePage,
     if (!BuildUtils.isWeb)
       ...[
         GetPage(
@@ -106,4 +108,9 @@ class AppPages {
             binding: RulesFilterCreatorBindings())
       ]
   ];
+
+  static final unknownRoutePage = GetPage(
+    name: AppRoutes.unknownRoutePage,
+    page: () => UnknownRoutePageView(),
+  );
 }

lib/main/routes/app_routes.dart

@@ -12,4 +12,5 @@ abstract class AppRoutes {
   static const identityCreator = '/identity_creator';
   static const rulesFilterCreator = '/rules_filter_creator';
   static const emailsForwardCreator = '/emails_forward_creator';
+  static const unknownRoutePage = '/notfound';
 }