Documentation Update: 0.6.19

[sg-doc-holiday]

Unauthenticated Requests Documentation

• Adds a new user guide detailing how unauthenticated API requests to the user settings endpoint are handled
• Documents the expected authentication methods and token locations for accessing user settings
• Includes example usage of the user settings endpoint without an access token
• Provides troubleshooting guidance related to authentication and authorization handlers
• Links to related OpenAPI documentation for further reference

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This was opened from: https://github.com/openops-cloud/openops/releases/tag/0.6.19

The publication for this is: Documentation