Rewrite create_wireframe_cube

[Lry722]

Rewrite create_wireframe_cube to create_wireframe_mesh
Now it will be based on model's collision_aabbs create wireframe.
In this way, models that are not cubes can be perfectly framed (such as stairs).

[Zylann]

Note that it creates undesired lines at the boundaries:

[Lry722]

Note that it creates undesired lines at the boundaries:

That's true, but it doesn't look bad anyway. I originally tried to implement it with a shader but failed.