Generate author pages

[caendesilva]

I think it's about time we generate dynamic pages for authors and blog post categories. We can have a feature flag system to control which of these are created, as well as an easy way to support setting the templates. We could also provide built-in pagination support for blog posts as a part of this rework.

See sister issue #15 which tracks category pages

[caendesilva]

Maybe we do this through extensions that can be controlled by the feature flags?

[caendesilva]

Splitting this out so that we have one issue for authors and one for navigation links

[caendesilva]

We will have to reconsider where the author's name should link to: (their website or profile page?)

Edit: Either way, if there is no set website, we should link to the author profile page

[caendesilva]

This is adding a ton of complexity, and will delay v2 quite a bit, so I'm going to hold off on this for the future.

[caendesilva]

These are essentially just https://github.com/hydephp/publications, but backed by dynamic data (authors/tags), wondering if we should not provide this as a prebuilt publication type thing instead.

[caendesilva]

Moved from hydephp/develop#1499 to here