docs: add Chinese README (README_CN.md)

[FMVPJet]

Summary

• Add a Simplified Chinese translation of the README (README_CN.md)
• Covers all sections: features, installation, usage, configuration, troubleshooting, and contributing
• Makes the project more accessible to Chinese-speaking users and contributors

Details

The Chinese README is a complete translation of the English version with appropriate localization (e.g., technical terms kept consistent with common Chinese developer conventions).

Test plan

• [x] Verify all markdown renders correctly
• [x] Verify all links point to correct targets
• [x] Verify table formatting is intact

[akromeo90-cmyk]

Hindi