📖 Add API Documentation with Doxygen

[lucaromagnoli]

Description

Generate comprehensive API documentation using Doxygen.

Tasks

• Create Doxygen configuration file
• Add detailed class and method documentation
• Document all public APIs
• Add usage examples in documentation
• Configure GitHub Pages deployment
• Add documentation CI/CD integration

Acceptance Criteria

• All public APIs are documented
• Documentation includes usage examples
• Doxygen generates clean HTML output
• Documentation is automatically deployed
• Documentation links work correctly

Dependencies

• Requires: Core implementation complete

Estimate

Priority: Medium
Effort: 2-3 days