Add humanize-chinese to Writing tools

[voidborne-d]

Tool Recommendation

• Tool Name & URL: humanize-chinese, https://github.com/voidborne-d/humanize-chinese
• Core Features: Detects AI-style patterns in Chinese text, rewrites text to sound more natural, and supports multiple rewrite styles for different writing contexts. It helps reduce template-like phrasing and AIGC traces in Chinese drafts while keeping the workflow local.
• Key Differentiators: Built specifically for Chinese, works fully offline, includes both detection and rewriting, and provides multiple style transforms instead of a single generic rewrite pass.
• Target Users: Researchers & Students, Content Creators, General Users, Developers & Programmers
• Getting Started: README with usage examples and CLI instructions is available in the repository: https://github.com/voidborne-d/humanize-chinese
• Pricing: Free and open source.
• Other: This PR adds humanize-chinese to the Writing section in README.md and adds the matching Chinese entry to README-CN.md.

[github-actions]

Hi @voidborne-d! 👋

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