moved theme creation from geometry to representation level

src/mol-geo/geometry/color-data.ts

src/mol-geo/geometry/direct-volume/direct-volume.ts

src/mol-geo/geometry/geometry.ts

src/mol-geo/geometry/lines/lines.ts

src/mol-geo/geometry/mesh/mesh.ts

src/mol-geo/geometry/points/points.ts

src/mol-geo/geometry/size-data.ts

src/mol-repr/index.ts

src/mol-repr/shape/index.ts

src/mol-repr/structure/complex-representation.ts

src/mol-repr/structure/complex-visual.ts

src/mol-repr/structure/representation/cartoon.ts

src/mol-repr/structure/units-representation.ts

src/mol-repr/structure/units-visual.ts

src/mol-repr/structure/visual/carbohydrate-link-cylinder.ts

src/mol-repr/structure/visual/carbohydrate-symbol-mesh.ts

...ol-repr/structure/visual/cross-link-restraint-cylinder.ts

src/mol-repr/structure/visual/element-point.ts

src/mol-repr/structure/visual/gaussian-density-point.ts

src/mol-repr/structure/visual/gaussian-density-volume.ts