- Create comprehensive data storage guide (docs/data_storage_guide.md)
- Update README.md with link to storage guide instead of full details
- Update README_en.md with link to storage guide
- Bilingual guide (Chinese and English) in single document
- Includes all storage options: CSV, JSON, Excel, SQLite, MySQL
- Detailed usage examples and documentation links
This change improves README readability by moving detailed storage
information to a dedicated document while keeping main README concise.
