modified per comments
authn updates including major json updates
policy.md doc updates
policy.md more doc updates
added previously missed review comments
flow diagrams updates
added json to policy, edits to other files
Update design_principles.md

Noted that rate limiting is now enforced for all organizations, per OKTA-44908.
Update design_principles.md

Added missing period in rate limiting sections.
Update design_principles.md

Added additional rate limit information per Conrad.
penultimate revision
updated authentication and factor APIs for EA release
merged doc review
updated status diagram and operation titles
Merge remote-tracking branch 'upstream/master'