[go_router] Provides a way to access current route data in a widget subtree. #110858
Description
Currently there is no API to get the current route information such as query parameter, path, or path parameter in a widget subtree underneath the page. Ideally go_router should provide a inherited widget or some sort to allow user to get GoRouteState or GoRouteMatch from the current context. for example
@override
Widget build(BuildContext context) {
final GoRouteState state = GoRouteState.of(context);
return Text('The location is ${state.location}');
}