Add support for Gitlab organisations

[evolvedlight]

:sparkles: What kind of change does this PR introduce? (Bug fix, feature, docs update...)

Bug fix: gitlab.com organisations couldn't be handled as the format is different

:arrow_heading_down: What is the current behavior?

Gives this error: NuKeeper.Abstractions.NuKeeperException: The provided uri was is not in the correct format.

:new: What is the new behavior (if this is a feature change)?

Runs successfully

:boom: Does this PR introduce a breaking change?

No

:bug: Recommendations for testing

Create a gitlab organisation, with a folder structure in it, run against that

:memo: Links to relevant issues/docs

:thinking: Checklist before submitting

• [ ] All projects build
• [ ] Relevant documentation was updated

[msallin]

@evolvedlight can you please rebase the branch on the latest master. Ty!

[evolvedlight]

@msallin sure, that's done

[msallin]

Thank you for your contribution!

[evolvedlight]

@msallin no problem, happy to help