Store hunt archive in Git repo

[cjquines]

this'll make it easier to fix the issues here tbh since we can get other people's involvement

we can either:

• have separate git submodules: probably fine since there isn't a lot of dependencies between hunt archives
• use a big monorepo: simple, avoids some of the submodule footguns

how are we going to deal with big files? put them on git lfs? gitignore them?

while we're at it, we can also probably restructure the git repo so we don't have a bunch of files in the rootdir; we can use a www subfolder like it is on the athena locker