wip, adding bond and sec struct related code from molql

src/apps/combine-mmcif/index.ts

src/apps/structure-info/index.ts

src/mol-math/geometry/grid-lookup.ts

src/mol-model/structure/model/formats/mmcif/bonds.ts

src/mol-model/structure/model/formats/mmcif/util.ts

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

src/mol-model/structure/model/properties/bonds.ts

...ol-model/structure/model/properties/seconday-structure.ts

src/mol-model/structure/model/types.ts

src/mol-model/structure/model/utils/compute-bonds.ts

src/mol-util/mask.ts

src/script.ts