wip, structure tools

src/mol-plugin/behavior/dynamic/representation.ts

src/mol-plugin/context.ts

src/mol-plugin/state/actions/structure.ts

src/mol-plugin/state/transforms/model.ts

src/mol-plugin/ui/structure/overpaint.tsx

src/mol-plugin/ui/structure/representation.tsx

src/mol-plugin/ui/structure/selection.tsx

src/mol-plugin/ui/structure/util.ts

src/mol-plugin/util/interactivity.ts

src/mol-plugin/util/structure-overpaint-helper.ts

src/mol-plugin/util/structure-representation-helper.ts

src/mol-plugin/util/structure-selection-helper.ts