Stig-Ørjan Smelror 81ffa53d70 Add comprehensive theme documentation and improve migration script
- Add THEMES-HOWTO.md: Complete guide for creating and customizing themes
- Remove theme sections from how-it-works.md to avoid duplication
- Update migration script to place all blog posts in single directory
- Streamline documentation structure for better organization
2025-05-31 03:00:50 +02:00
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