Generate Schema.org JSON-LD for venue pages
Source:R/utils_build_metadata.R
generate_venue_schema_org.RdCreates structured metadata using `@graph` to represent the venue (journal, conference, community or institution) as an appropriately-typed Schema.org entity - a `Periodical` for a journal, an `EventSeries` for a conference, `Organization` otherwise, carrying the same metadata as the venue's landing page panel (name, url, description, logo, identifiers as `PropertyValue`s, via [get_venue_metadata_fields()]) - together with a `Review` per checked paper, whose `itemReviewed` `ScholarlyArticle` links back to the venue via `isPartOf`. Mirrors [generate_codechecker_schema_org()]. Addresses register#183.