Add Wikidata link for authors of Originals on individual pages

[lehkost]

I think we just forgot to implement this. 🙃 In the overview, the Wikidata IDs for authors of original plays are displayed, see here.

However, if you click on an actual play, no author info is provided other than the name. It would be great to mirror the behaviour of the German einakters.

Example:

• Molière's Les précieuses ridicules has neither the original author ID nor lifedates/picture from Wikidata.
• one of the translations of the plays, Die Ueberbildeten, has author ID and lifedates/picture.

I remember we collect info on authors in "authors.json". If we do in fact collect data for authors of originals, we could collect this data in another file "authors-originals.json".