parsing ply-file to ply-data-structure is working

src/apps/structure-info/volume.ts

src/mol-io/reader/cif/text/parser.ts

src/mol-io/reader/common/text/tokenizer.ts

src/mol-io/reader/ply/parse_data/data-model.ts

src/mol-io/reader/ply/parse_data/ply_parser.ts

src/mol-io/reader/ply/read_data/data.ts

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