Alex Clavelle

create amd functionality

1

I redid my original amd pull request, sorry it took so long guys.

Hey again @brandonlamb. I'm testing out this lib and I'd like to propose a feature. In the past, I've used the implementation from gdquest's [godot-3d-mannequin](https://github.com/GDQuest/godot-3d-mannequin/blob/master/godot/src/Main/StateMachine/StateMachine.gd) In gdquest's implementation, transition takes...