Test WebPublication

Related schemas: https://wikisphere.org/wiki/Special:PrefixIndex?prefix=&namespace=2300

docs:

• https://readium.org/guided-navigation/roles.html
• https://json-schema.org/draft-07/schema#
• https://github.com/readium/webpub-manifest/tree/master
• https://pmk65.github.io/jedemov2/dist/demo.html
• https://readium.org/webpub-manifest/schema/publication.schema.json
• https://www.edrlab.org/about/
• https://github.com/bjdash/JSON-Schema-Builder?tab=readme-ov-file
• https://bjdash.github.io/JSON-Schema-Builder/
• https://json.bootsphp.com/jsonSchemaCreator/
• https://github.com/w3c/epub-specs/blob/main/epub33/explainers/EPUB33-explainer.md
• https://github.com/w3c/epub-specs/tree/main