fix(webpack): move Rslib to devDependencies

[colinaaa]

Summary

Avoid installing Rslib as dependencies of @rsbuild/plugin-webpack-swc.

Related Links

Checklist

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

[netlify]

✅ Deploy Preview for rsbuild ready!

Name	Link
🔨 Latest commit	470dd70
🔍 Latest deploy log	https://app.netlify.com/sites/rsbuild/deploys/6738454e7e304e0008a63a01
😎 Deploy Preview	https://deploy-preview-3990--rsbuild.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.
Lighthouse	1 paths audited Performance: 81 (🟢 up 11 from production) Accessibility: 97 (no change from production) Best Practices: 100 (no change from production) SEO: 100 (no change from production) PWA: 60 (no change from production) View the detailed breakdown and full score reports

---

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

[chenjiahan]

NIce catch 👍