create repository at organization

When adding a remote to a local repository (`gin add-remote `) on gin and the location does not exist, the user can decide to create it directly. However, when using e.g. `gin:/` 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.