Create a concept for granting access and document access for services

We need a concept for granting access and document access for services Google Search Console and all other services we could use for typo3.org and its websites.

I suggest, that we need two things:

• a public documentation about all services, with a list of the admins / responsible people for that service and a link to the internal (non-public) documentation. This list should only be visible to authenticated users of typo3.org
• for each service we should create a non-public gitlab project. Documentation should be done with .md files