docs: add Chinese (zh-CN) translation of README

[ruguoba]

Added a Chinese (zh-CN) translated version of the README as README_zh-CN.md.

This translation covers project intro, installation, features, and community sections.

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All committers have signed the CLA.

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[ruguoba]

@CLAassistant please recheck

[ruguoba]

@CLAassistant please recheck