Add copy capability to vector3 values ​​in the transform tree.

[stdgn]

I think it would be nice to have the ability to copy and paste the values ​​of other objects that we want to be the same size or in the same rotation. :)

[Calinou]

This is already implemented in 4.0alpha and 3.5beta: godotengine/godot#39404

In those versions, this is also accessible via a right-click context menu: