wip, made Color a tagged number type

src/mol-app/ui/transform/backbone.tsx

src/mol-app/ui/transform/ball-and-stick.tsx

src/mol-app/ui/transform/carbohydrate.tsx

src/mol-app/ui/transform/cartoon.tsx

src/mol-app/ui/transform/distance-restraint.tsx

src/mol-app/ui/transform/spacefill.tsx

src/mol-geo/representation/volume/surface.ts

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

src/mol-model/structure/structure/carbohydrates/constants.ts

src/mol-util/color/color.ts

src/mol-util/color/index.ts

src/mol-util/color/tables.ts

src/mol-view/theme/color/carbohydrate-symbol.ts

src/mol-view/theme/color/chain-id.ts

src/mol-view/theme/color/cross-link.ts

src/mol-view/theme/color/element-index.ts

src/mol-view/theme/color/element-symbol.ts

src/mol-view/theme/color/uniform.ts

src/mol-view/theme/color/unit-index.ts

src/mol-view/viewer.ts