docs: use meta.json to generate nav and sidebar configs

[chenjiahan]

Summary

Use meta.json to generate nav and sidebar configs, see: https://rspress.dev/guide/basic/auto-nav-sidebar

Benefits:

• Automatically generate sidebar configuration, no need to configure rspress.config.ts.
• Automatically read the h1 of the document as label
• Allow Chinese and English documents to configure different navigation configs

Note that some URLs has changed due to this change.

Checklist

• Tests updated (or not required).
• Documentation updated (or not required).

[netlify]

✅ Deploy Preview for rspack ready!

Name	Link
🔨 Latest commit	c3ab9dd
🔍 Latest deploy log	https://app.netlify.com/sites/rspack/deploys/6628a44e491e7c0008ff2912
😎 Deploy Preview	https://deploy-preview-6345--rspack.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.