Restructure documentation for clarity

Reorganize the documentation structure to improve navigation and accessibility. Added new sections for Getting Started, Authentication, Security & Error Handling, Providers, and API Endpoints, refining the overall layout. This enhances user experience by categorizing related topics, making it easier to find information quickly.

Author: eliasjpr

docs/SUMMARY.md

@@ -1,12 +1,33 @@
+
 # Table of contents
 
 * [Introduction](README.md)
 * [In Action](in-action.md)
 * [Performance at Scale](performance-at-scale.md)
 * [Roadmap / Features](roadmap-features.md)
 
-## DEVELOPMENT
+## Getting Started
+* [Introduction](introduction.md)
+* [Installation](installation.md)
+* [Configuration Overview](config-overview.md)
+
+## Authentication
+* [Authentication Guide](authentication.md)
+* [API Documentation](api-documentation.md)
+* [Customizing Authentication](customizing-authentication.md)
+
+## Security & Error Handling
+* [Security Considerations](security.md)
+* [Error Handling & Troubleshooting](error-handling.md)
 
+## Providers
+* [Client Providers](client-providers.md)
+* [Owner Providers](owner-providers.md)
+
+## API Endpoints
+* [API Endpoints](api-endpoints.md)
+
+## DEVELOPMENT
 * [Requirements](development/requirements.md)
 * [Database](development/database.md)
 * [User Interface](development/user-interface.md)
@@ -15,7 +36,6 @@
   * [Environment Variables](development/deployment/configuration.md)
 
 ## Reference
-
 * [OAuth Terms](reference/oauth-terms.md)
 * [OAuth 2 Grant Flows](reference/oauth-2-api/README.md)
   * [Device Flow](reference/oauth-2-api/device-flow.md)