Improve debugging

[fire]

@GuilhermeGSousa Can you fill this one out?

[GuilhermeGSousa]

The ideas I had:
For editor debugging:

• Visualization implemented for all features, right now we only have it for trajectory

For runtime debugging:

• For starters we need the "on motion matching selection" signal back, I think that got broken when we started using the MM Animation Node
• We need to have an option so see the scores the top N animations that scored the best of a given motion matching selection. This is extremely useful to know why an animation did or didn't get selection, and how to tweak the features to change that.
• Once we have the two above, we could build a system that records all selections, so we can rewind and see previous selections