refactoring of column and CIF data model

src/mol-base/collections/_spec/table.spec.ts

src/mol-base/collections/column.ts

src/mol-io/reader/_spec/column.spec.ts

src/mol-io/reader/cif/binary/field.ts

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

src/mol-io/reader/cif/data-model.ts

src/mol-io/reader/cif/schema.ts

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

src/mol-io/reader/common/text/column/fixed.ts

src/mol-io/reader/common/text/column/token.ts