feature: sha256 repositories
This is no longer unstable in Git, so it would be cool if Radicle supported
the SHA-256 object format. Right now, if you try to rad init...
✗ Error: unknown object format 'sha256'; class=Repository (6); code=Invalid (-21)
We would have to wait for our dependencies to support this
too. Currently, we use git2/libgit2 which does not currently have
support for SHA-256. I believe they're working on it though. We may
also be switching to use Gitoxide, which has planned support for
SHA-256, but I don't believe it is supported yet either.