Delete Repo on Fly.io Gogs instance

[nelsonic]

Following on from the Create Repo #9 we need a way to programatically
We need a way to programmatically delete a repo so that we can clean-up during our E2E tests.

• Create remote_repo_delete/2
  • accepts: org_name and repo_name as arguments
  • DELETE /repos/:owner/:repo see: https://github.com/gogs/docs-api/tree/master/Repositories#delete
• Export TestDouble (HTTPMock) for testing

[nelsonic]

OK, this is getting out of hand ... https://gogs-server.fly.dev/

Going to work on this now!
BRB!