Added comprehensive documentation for implementing Zelda-style
dialog systems using the GameState push/pop stack pattern.
Includes:
- Complete working dialog state example with text animation
- Integration guide for game states
- Character portraits and name box support
- Post-dialog callback handling via resume()
- Visual diagrams of state stack behavior
- Best practices for when to use push/pop vs flags
This pattern allows developers to create professional dialog systems
with proper input control and clean state management.
