feat(replay_bloc): expose List<State> from ReplayBloc/ReplayCubit similar to ReplaySubject

[narcodico]

Description

Please consider exposing a List<State> from ReplayBloc/ReplayCubit similar to ReplaySubject. This would allow for easy access to previous limit number of states.

Desired Solution

I would like to have handy access to previous states without having to manually cache them. Also you could allow specifying no of steps to undo/redo, e.g.: undo([int steps = 1]). Maybe even using an index, e.g.: undoToIndex(int index) which could be helpful to reset say a HydratedBloc used in conjuncture with a ReplayBloc to initial state at any given point with undoToIndex(0).
Might be some value to also allowing undoTo(State state) even though a state could be directly emitted.

Alternatives Considered

Manually caching states, which is not scalable/reusable.