📚 Add Code Documentation (Dartdoc)

[safayavatsal]

Problem

Insufficient code documentation. No dartdoc comments on public APIs.

Solution

1. Add dartdoc comments to all public classes, methods, complex logic sections
2. Use proper dartdoc format with examples
3. Generate documentation with dart doc
4. Set up GitHub Pages to host documentation

Priority Focus

• All repository classes (highest priority)
• All BLoC classes
• Public models
• Utility classes

Estimated Effort

6 hours

Priority

Low - Important for maintainability

Labels

priority:low, type:documentation, effort:medium