Nurbs for compas solid shapes equivalent

# Feature Request

As a [user], I want [to have compas_nurbs equivalent of compas.geometry.shapes] so that [I can easily swap my code from mesh to nurbs].

## Details

**Is your feature request related to a problem? Please describe.**
I have already been using compas shapes such as `Box `and `Cylinder` to construct complex geometries, using compas_cgal for boolean. I do that solely for the purpose of visualization. However if I want to export a nurbs representation in Rhino (or solid model in general) with perfectly round holes for fabrication, there is no compas-way to do so at the moment.

**Describe the solution you'd like**
I want to have `compas_nurbs.Box` , `compas_nurbs.Cylinder` that has either same constructor signature as the `compas.geometry` equivalent or have a constructor that converts a `compas.geometry` equivalent to `compas_nurbs` equivalent.

I also want compas_nurbs to be able to perform boolean operations (maybe using Rhino as backend). Resulting in polysurfaces that I'm able to json serialize and `Artist.draw()` in Rhino as polysurface.

**Describe alternatives you've considered**
I have to rewrite my solid modeling code with RhinoPython / RhinoScriptSyntax / RhinoCommons library with Rhino performing boolean.