34 Add catalog descriptor

src/assets/catalogExample1.json

src/components/OcTreeCommunity/OcTreeCommunity.vue

...iptors/OcDescriptorCatalog/OcDescriptorCatalog.stories.ts

...s/descriptors/OcDescriptorCatalog/OcDescriptorCatalog.vue

...descriptors/OcDescriptorResource/OcDescriptorResource.vue

src/declarations.ts

src/modelMetadata/catalog.ts

src/modelMetadata/dataset.ts

src/modelMetadata/resource.ts

src/pages/community/[community]/[resource]/[identifier].vue

src/pages/community/[community]/index.vue

src/pages/index.vue

src/sparql/catalog.ts

src/sparql/datasets.ts

src/sparql/resource.ts

src/sparql/sparql.ts

src/sparql/vocabularies.ts