fix: dont fail on uninitialized repo

[dryajov]

See this comment for background - ipfs/js-ipfsd-ctl#242 (comment)

[vasco-santos]

👍

[alanshaw]

I've checked this works and it does 👍 - thank you

// TODO: (dryajov) This is really hacky, there must be a better way

If we require('ipfs-repo').errors we can check the error for the specific code, guarding against future changes to this message.

We should keep the other regex checks (for other possible errors) but we should use the code if possible.

[dryajov]

@alanshaw I agree we should rework that section entirely, but I would rather wait for the rest of the datastores to emit similar error codes instead of introducing ad hoc checks. @hugomrdias is already working on this AFAIK, and this code has it's days counted (hopefully!)

[alanshaw]

Right, gotcha, if you wouldn't mind submitting a PR when we can change them all that would be great.