Add Metainfo and Schema.org data

[tomheller]

To improve SEO value and improve visualisation of search results we could add schema-org data to the page.

https://developers.google.com/search/docs/guides/enhance-site

Possible schemas that we could fill:

• Organization
• Person
• Review
• Offer

[metmajer]

Thanks for your suggestion - great idea! I'll have a look at these soon.