wip: add link to author page in article header

[mlbrgl]

⚠️ This is a PoC, do not merge.

Adds a link to author pages in the byline of articles.

[mlbrgl]

• wip: add link to author page in article header #3626 👈
• master

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[mlbrgl]

Discussed during site dev meeting on May 21:

• ✅ do not add to post_links table for now
• ✅ do not create a separate entity, table for authors. Source of truth remains the author gdocs.
• ⏳ decouple from linkedDocuments, and use an additional attachment.

[ikesau]

Not necessarily part of this branch but just thought that we'll want to have authors' names be clickable in

• https://ourworldindata.org/data-insights
• https://ourworldindata.org/data-insights/in-the-last-200-years-many-countries-have-built-institutions-to-collect-statistics-on-their-populations

as well :]

[mlbrgl]

@ikesau yep, I agree. There are a bunch of places we had in mind but decided to introduce those links gradually. As you pointed out, we'll work on those in separate PRs.

(closing this one in favor of #3633 due to a messy rebase saved by reflog 🥵)