Set entire admin-shell profile to private

[arnoweiss]

Is your feature request related to a problem? Please describe.
I have heard from multiple people in my organisation that they were confused as to where admin-shell related repos are maintained. The disclaimer only appears in the readme of the package-explorer repo and there is no reason to keep this outdated version public.

Describe the solution you'd like
Set the entire admin-shell github profile to private, including all repositories.

Describe alternatives you've considered

Additional context
Add any other context or screenshots about the feature request here.