feat(event): ingest

[dargmuesli]

Allow users to input a web resource which describes an event so that the user can then own that event on maevsi.

Useful resources:

• by specification
  • https://github.com/namsral/microdata
  • https://github.com/digitalbazaar/jsonld.js
• by crawling
  • https://jina.ai/
  • https://platform.openai.com
  • https://trafilatura.readthedocs.io/en/latest/
• exemplary data
  • https://veranstaltungen.uni-kassel.de/event/unikasseltransfer-feiert-20-jahre-jubilaum-4270