Repository scaling issues

[AlexMarkUSDS]

This repository expands in size as a full copy of https://github.com/usds/techfar-hub-website-v3 on every commit/preview. Eventually, that causes the repo size to be > 8gb, and our github runners start to fail.

It would be good to fix that architectural issue, but it can also be patched by running:

git-filter-repo --path branches/<branch-to-keep>

and force pushing that version of main to this repository.