Options for CAD formats

[mwestphal]

CAD formats has been introduced by !236
Visual quality highly depends on the meshing parameters.
Currently, these parameters are hard-coded with a trade-off between loading speed and visual quality.
Moreover, it is standard for CAD visualizer to display surfaces boundaries (curves discretized with poly-lines) but sometimes we do not want it.

How to handle these CAD specific options?

[mwestphal]

https://gitlab.kitware.com/f3d/f3d/-/issues/221

[mwestphal]

@Meakk you started work on this right ?

[mwestphal]

dropping priority on this

[mwestphal]

related to #1193

[mwestphal]

Discussion needed to identify which option to expose, but first #1193 is needed