Better Documentation for Fine-grained Personal Access Tokens

What would you like added?

GitHub now supports fine-grained PAT. A guide that covers how to configure a token with LPA (least privileged access) for common scenarios would be a helpful guide.

A clear and concise description of what you want to happen.
Documentation that leverages the new fine-grained PAT, and provides sets of permissions one may use to create a fine-grained PAT for common scenarios in which one would use ARC.

Why is this needed?

Having documentation that tells users to use PAT that provide large scale permissions is not the best security approach. It is a common practice to generate tokens with LPA permissions.

A clear and concise description of any alternative solutions or features you've considered.
I am manually building my own sets of permissions at the moment for the various scenarios we use ARC in.

Additional context

Add any other context or screenshots about the feature request here.
Fine-grained PAT now allows tokens for specific repositories, with more fine grained permission controls.

No file or test is named in the issue. Start by locating the current ARC documentation for PAT or authentication and compare its recommendations with GitHub's fine-grained PAT permissions. Done means a guide lists least-privilege permission sets for common ARC scenarios.