implement reversePolygonWinding for actual geometries, not just vertex entries in an obj file

[meszaros-lajos-gyorgy]

currently this is the only way I can flip a mesh inside out:

loadOBJ('someobject', {
  reversedPolygonWinding: true
})

I learned from when working with the basketball map that torus geometries are for some reason render inside out in Arx, so I have to cover that up by making the polygon doublesided:
https://github.com/meszaros-lajos-gyorgy/arx-map-basketball-course/blob/master/src/prefabs/hoop.ts#L18

[meszaros-lajos-gyorgy]

I forgot to call toArxCoordinateSystem(geometry) and that fixes the torus, but apart from that it would be nice to have this feature.