While the HEAD is pointed to the correct branch (might not exist), we created the initial files during repo creation still on the master branch (as it's an empty repo and clone by default sets up master when cloning an empty repo)
Preparing the support for harness specific API router + http handler, which allows us to have complete control over the rest api naming and functionality, without having to do complex path rewrites or request / reponse rewrites inline.
This change introduces the concept of a principal (abstraction of call identity), and adds a new service account type principal. Also adds support for different tokens (session, PAT, SAT, OAuth2) and adds auth.Session which is being used to capture information about the caller and call method.
