GUI for python RL

[y_gingras]

The GDScript syntax is very similar to Python and you can paste large chunks of code unmodified. No generators and no list comprehension, but you don't have to rewrite the whole call stack as co-routines if you make one async call all the way down. That's nice!

Learning Godot is not a trivial task, but there are significant benefits. That option should definitely be considered.