This implements the `stroke_arrange` operator for grease pencil v3.
This behaves the same as `GPENCIL_OT_stroke_arrange` but renamed to `stroke_reorder`.
It should be more clear what the operator does.
Note: This also adds new key binds.
Co-authored-by: Falk David <filedescriptor@noreply.localhost>
Pull Request: https://projects.blender.org/blender/blender/pulls/116682