Can you explain the concept and main features of Navigator 2.0 in Flutter?

Navigator 2.0 in Flutter is a new navigation system that provides a more flexible and declarative way to manage routes and navigation history compared to the classic Navigator 1.0.

Main features of Navigator 2.0:

• Declarative approach: navigation is described through the application's state, not through push/pop method calls.
• Support for URL and deep linking: allows synchronization of navigation state with the URL, which is important for web applications and complex scenarios.
• Flexible route stack management: you can explicitly control the list of pages that are displayed.
• Integration with Router and RouteInformationParser: for parsing URLs and generating navigation state.

Example usage:

class MyRouterDelegate extends RouterDelegate<MyRoutePath>
    with ChangeNotifier, PopNavigatorRouterDelegateMixin<MyRoutePath> {
  final GlobalKey<NavigatorState> navigatorKey;

  List<Page> pages = [];

  @override
  Widget build(BuildContext context) {
    return Navigator(
      key: navigatorKey,
      pages: List.of(pages),
      onPopPage: (route, result) {
        if (!route.didPop(result)) return false;
        // update navigation state
        notifyListeners();
        return true;
      },
    );
  }

  // other methods for managing navigation
}

Thus, Navigator 2.0 allows creating more complex and manageable navigation scenarios, especially useful for large applications and web platforms.