✨ Features:
- BEM CSS methodology for stack templates (.stack, .stack__header, .stack__title, .stack__description, .stack__content)
- Enhanced documentation with comprehensive examples
- Template publishing system via bin/publish-template.js
- Full compatibility with Nera v4.1.0

🏗️ Architecture:
- Uses getAppData() function for global app-level stack data
- Stacks available via app.stacks in all templates
- Support for custom layout templates via stack_layout frontmatter
- Automatic slug generation from stack titles

🧪 Testing:
- 4 comprehensive tests covering all functionality
- Template publishing logic with overwrite prevention
- Stack rendering with and without custom layouts

📚 Documentation:
- Professional README.md with BEM CSS examples
- CHANGELOG.md with detailed release notes
- Enhanced package.json metadata
- Complete API documentation