3D OBB with pointer-based manipulation features.

We say "frame" because only the 12 edges of the box are rendered via bevy_polyline.

Faces of the box can be dragged by the pointer to manipulate the box extents. As the pointer hovers over each face, visual feedback is provided (highlight material).

Depends on [bevy_mod_picking::DefaultPickingPlugins] and [bevy_polyline::PolylinePlugin].