Add redirects for archives

What does this MR do and why?

Adds redirects for archived pages. When a visitor requests a version of a page that has moved to the Archives site, we need to redirect them over there.

Closes #30 (closed).

Screenshots, screen recordings, or links to review app

n/a

How to set up and validate locally

Can't test locally, we'll need to test this post-merge.

Merge request acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this merge request.

Closes #30 (closed)