[Enhancement] Ability to Exit Basic States with Different Results

[DamianSuess]

Description

Add the ability for a basic state and not just Command states to be able to exit using the Result enum such as, Success, Error, and Failure.

Context

I want all types of states to utilize the same core behaviors.

Example

// Define the state machine
var machine = new StateMachine<StateId>();
 machine.RegisterState<State1>(StateId.State1, onSuccess: StateId.State1, onError: StateId.State2, onFailure: null, subscriptionTypes: null);
machine.RegisterState<State2>(StateId.State2, onSuccess: StateId.State1, onError: null, onFailure: StateId.State3, subscriptionTypes: null);
machine.RegisterState<State3>(StateId.State3, subscriptionTypes: null);
await machine.RunAsync(StateId.State1);

// Exit with a non-Success status Result
public class State2 : IState<StateId>
{
  public Task OnEnter(Context<StateId> context)
  {
    context.NextState(Result.Error);
    return Task.CompletedTask;
  }
}