Injects some state to descendants in the Widget tree.

Here's a simple example of injecting some int state into the widget tree:

class MyInjection extends RearchInjection<MyInjection, ValueWrapper<int>> {
  const MyInjection({required super.child, super.key});

  @override
  ValueWrapper<int> build(BuildContext context, WidgetHandle use) {
    return use.data(0);
  }

  static ValueWrapper<int> of(BuildContext context) =>
      RearchInjection.of<MyInjection, ValueWrapper<int>>(context);

  static ValueWrapper<int>? maybeOf(BuildContext context) =>
      RearchInjection.maybeOf<MyInjection, ValueWrapper<int>>(context);
}

You can think of a RearchInjection as a RearchConsumer wrapped around an InheritedWidget (as that is exactly how it is implemented), but with minimal boilerplate.

WARNING

This class is experimental since I am not yet 100% sold on the API. It's a little too verbose still for my tastes (and unfortunately, the development of macros was halted).