added wedge and plane primitives, added directiong wdges to cartoon

src/mol-geo/primitive/box.ts

src/mol-geo/primitive/cylinder.ts

src/mol-geo/primitive/icosahedron.ts

src/mol-geo/primitive/plane.ts

src/mol-geo/primitive/polyhedron.ts

src/mol-geo/primitive/wedge.ts

...geo/representation/structure/visual/polymer-trace-mesh.ts

src/mol-geo/shape/mesh-builder.ts

src/mol-view/stage.ts