[etos_flutter] We need a way to easily access the current state from scope

[SEGVeenstra]

For example in the initState when you need to perform an action on the current state.

Something like:

@override
void initState() {
  final currentState = EtosProvider.of(context).state; 
  
  if(currentState.hasLoadedItems == false) {
    context.dispatch(LoadItemsEvent());
  }
}

NOTE: currently EtosProvider.of(context) returns an untyped Etos instance because it was only meant to dispatch.

[SEGVeenstra]

We can get the state from:

Tstate get state => _statesController.value;

Which is already part of Etos