first pass at adding rcsb assembly symmetry plugin

package.json

src/mol-model-props/rcsb/assembly-symmetry.ts

src/mol-model-props/rcsb/themes/assembly-symmetry.ts

src/mol-plugin/behavior/dynamic/custom-props.ts

...ior/dynamic/custom-props/pdbe/structure-quality-report.ts

...n/behavior/dynamic/custom-props/rcsb/assembly-symmetry.ts

src/mol-plugin/index.ts

src/mol-util/graphql-client.ts

src/servers/model/properties/providers/rcsb.ts