Print clone line on repo create

[secondary-smiles]

Pretty much as the title suggests, It'd be nice if upon a successful ssh <url> repo create <name> the response message would be git clone <new repo url>

e.g.

$ ssh <url> repo create <name>
git clone git@<url>:<name>.git # <-- returned by soft-serve

I'm happy to try and implement this myself, but I'm new to go so it might take a while/not be idiomatic.

So I figured I'd put it out here before taking a stab at a PR so that a more experienced go dev can also try to implement this if they want.