migrate away from git.torproject.org
The plan is to deprecate git.tpo (tpo/tpa/team#40472 (closed)). Let's migrate away from it.
decide a commit signing workflow that works for us (#8)
migrate go packages to use gitlab.tpo instead of git.tpo as their module name.
move goptlib to gitlab.
make sure TB, guardian project and others use the new repos
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information