wip, theme refactor

src/apps/render-test/state.ts

src/mol-geo/representation/structure/point.ts

src/mol-geo/representation/structure/spacefill.ts

src/mol-geo/representation/structure/utils.ts

src/mol-geo/shape/vertex-map.ts

src/mol-geo/size/index.ts

src/mol-geo/theme/index.ts

src/mol-geo/theme/structure/color/element.ts

src/mol-geo/theme/structure/color/index.ts

src/mol-geo/theme/structure/size/index.ts

src/mol-geo/theme/structure/size/vdw.ts

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

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

src/mol-gl/_spec/renderer.spec.ts

src/mol-gl/renderable/mesh.ts

src/mol-gl/renderable/point.ts

src/mol-gl/renderable/util.ts

src/mol-util/color/color.ts

src/mol-util/color/index.ts

src/mol-util/color/scale.ts