compute polymer ranges when building model from mmcif

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

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

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

src/mol-model/structure/model/properties/atomic/hierarchy.ts

src/mol-model/structure/model/properties/coarse/hierarchy.ts

...l-model/structure/model/properties/utils/atomic-ranges.ts

...l-model/structure/model/properties/utils/coarse-ranges.ts