feat: Restructure into Beginners and Intermediate guides
🔄 MAJOR RESTRUCTURE:
- Move all existing content under '/beginners/' path
- Create '/intermediate/' section with advanced collaboration outline
- Update navigation to support two learning tracks
📁 Beginners Guide (Complete - 20+ guides):
- All existing tutorials, how-to guides, explanations preserved
- Updated all internal links to new /beginners/ paths
- Maintains full functionality of original content
🚀 Intermediate Guide (Preview structure):
- 4 advanced tutorials (Multi-session, Domain teaching, etc.)
- Placeholder how-to guides for complex workflows
- Advanced explanations for sophisticated collaboration
- 'Coming soon' content with structured outlines
🏗️ Navigation & Structure:
- Two-tier sidebar: Beginners (start here) / Intermediate (advanced)
- Updated homepage to explain both learning paths
- Preserved all original content organization within beginners
- Added appropriate badges ('Preview', 'Coming soon', etc.)
Ready for intermediate content development while maintaining
full functionality of the complete beginners guide.
fab2254318