Add LEDU Chinese course content and documentation
Add comprehensive Chinese reading course (乐读) with 4 chapters of vocabulary, texts, and exercises. Include architecture documentation for module development and progress tracking system.
Content:
- LEDU book metadata with 12 chapter outline
- Chapter 1: Food culture (民以食为天) - 45+ vocabulary, etiquette
- Chapter 2: Shopping (货比三家) - comparative shopping vocabulary
- Chapter 3: Sports & fitness (生命在于运动) - exercise habits
- Chapter 4: Additional vocabulary and grammar
Documentation:
- Architecture principles and patterns
- Module creation guide (Game, DRS, Progress)
- Interface system (C++ style contracts)
- Progress tracking and prerequisites
Game Enhancements:
- MarioEducational helper classes (Physics, Renderer, Sound, Enemies)
- VocabularyModule TTS improvements
- Updated CLAUDE.md with project status
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
StillHammer
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