docs: add badges to README

[chenjiahan]

Summary

Add some badges to README:

Checklist

• [ ] I have added changeset via pnpm run change.
• [x] I have updated the documentation.
• [ ] I have added tests to cover my changes.

[netlify[bot]]

✅ Deploy Preview for rsdoctor ready!

Name	Link
🔨 Latest commit	279df4742292eb6b7c84e79287f5842940405d92
🔍 Latest deploy log	https://app.netlify.com/sites/rsdoctor/deploys/65f2bfed6f911800080dd11e
😎 Deploy Preview	https://deploy-preview-218--rsdoctor.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.