CharacterBody2D / 3D don't specify which space the Velocity is in.

**Your Godot version:**
4.4.1

**Issue description:**
Nowhere in the docs for the CharacterBody2D or CharacterBody3D the user can find out whether the Velocity should be a local, object local, or a global vector. Same with the returned vectors from various functions in the CharacterBody (get_last_motion, ...).

I think all of the vectors used and returned are in a global space.

There are other classes in the documentation which have the space speficied.

**URL to the documentation page (if already existing):**
https://docs.godotengine.org/en/4.4/classes/class_characterbody3d.html#characterbody3d