docs: add bun command examples

[dannote]

It's time!

[netlify]

✅ Deploy Preview for vue-router ready!

Name	Link
🔨 Latest commit	beaa9b5
🔍 Latest deploy log	https://app.netlify.com/sites/vue-router/deploys/66a3504cc99b7e00084687e3
😎 Deploy Preview	https://deploy-preview-2313--vue-router.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.
Lighthouse	1 paths audited Performance: 96 (🟢 up 1 from production) Accessibility: 100 (no change from production) Best Practices: 100 (no change from production) SEO: 92 (no change from production) PWA: - View the detailed breakdown and full score reports

---

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

[skirtles-code]

Similar to #2089.

I understand why that PR was closed, but the core Vue docs do include similar instructions for bun at https://vuejs.org/guide/quick-start.html.