Adds the basic for harness embedded mode:
- Harness dedicated router with custom APIHandler
- Inline Space Creation
- Client for Account/Org/Project
- Bootstrap (Allows for automated creation of admin user and gitness service (used for all platform required ops))
- Inline harness service principal creation
- Ignore flag for ACL.
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.
