Expose InternalTransitions with an Event Handler

[juliusl]

Feature request (copied from draft PR)

In one of my projects I use System.Reactive to drive parts of the state machine. I find InternalTransitions useful for a bunch of discrete steps you'd like fine-grained control on, but that do not represent a super state. I noticed in the current implementation these transitions are not exposed to the OnTransitioned handler, which I find reasonable as they do not represent a transition.

However, it would be useful to expose them in a way so that you could use RX to drive the state machine using internal transitions as well as normal transitions.

I added a draft PR for discussion and review.

#376

Thanks,

[HenningNT]

Thank you!

Please find my comments in the PR discussion.