Add board navigation and assets

- Introduced new board-related assets in AssetsManager.
- Updated NetworkManager to increase connection and receive timeouts to 20 seconds.
- Added BoardRouteData for navigation to the BoardScreen.
- Updated app routes to include the new board route.
- Modified DesktopNavigationWidget to include a navigation item for the board.
- Added a new string constant for the board label in TendersStrings.

lib/core/routes/app_routes.dart

@@ -2,6 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:go_router/go_router.dart';
 import 'package:provider/provider.dart';
 import 'package:shared_preferences/shared_preferences.dart';
+import 'package:tm_app/views/board/board_screen.dart';
 import 'package:tm_app/views/completion_of_documents/pages/complectopn_of_documents_screen.dart';
 import 'package:tm_app/views/detail/pages/detail_screen.dart';
 import 'package:tm_app/views/forget_password_create/pages/forgot_password_create_screen.dart';
@@ -265,6 +266,16 @@ class LikedTendersRouteData extends GoRouteData with _$LikedTendersRouteData {
   }
 }
 
+@TypedGoRoute<BoardRouteData>(path: '/board')
+class BoardRouteData extends GoRouteData with _$BoardRouteData {
+  const BoardRouteData();
+
+  @override
+  Widget build(BuildContext context, GoRouterState state) {
+    return const BoardScreen();
+  }
+}
+
 // @TypedGoRoute<CompletionOfDocumentsRouteData>(
 //   path: '/completion-of-documents',
 // )