We currently have documentation for the JSON structure of Wikibase Items at the JSON topic on the Wikibase documentation. We should also have similar documentation for Lexemes on a samiliar page (the current documentation is maintained at docs/topics/json.md in Wikibase).
Example JSON: https://www.wikidata.org/wiki/Special:EntityData/L1.json
Acceptance Criteria:
- JSON Structure of Lexmes (and Forms and Senses) is documented in the WikibaseLexeme codebase.
- Documentation in the WikibaseLexeme codebase links to Item JSON structure documentation in the main Wikibase documentation.