chem_comp_bond as custom property

src/apps/structure-info/model.ts

src/mol-data/int/impl/segmentation.ts

src/mol-data/int/segmentation.ts

src/mol-model/structure/export/categories/chem_comp_bond.ts

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

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

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

...mol-model/structure/model/properties/custom/collection.ts

...mol-model/structure/model/properties/custom/descriptor.ts

...mol-model/structure/structure/unit/links/intra-compute.ts