create repository at organization

[JuliaSprenger]

When adding a remote to a local repository (gin add-remote <remote_name> <location>) on gin and the location does not exist, the user can decide to create it directly. However, when using e.g. gin:<organization>/<repo> as remote, the repository is not created at the organization level, but under the user that is currently logged in.

I think there are 2 things to fix here:

• The user should be informed if the remote can not be created at the organization level (i.e. due do lack of user rights)
• If a repository can be created, than it should be at the specified organization and not under the user gin space.