Rework decK documentation

[mheap]

Description

Opening as a draft to get feedback from CX. Do not merge

Rebuild the decK documentation from scratch:

• Unversioned content
• Concrete usage examples

Testing instructions

Preview link:

Checklist

• Review label added
• Conditional version tags added, if applicable.

[netlify]

✅ Deploy Preview for kongdocs ready!

Name	Link
🔨 Latest commit	d6eb252
🔍 Latest deploy log	https://app.netlify.com/sites/kongdocs/deploys/679c9cf2b84b7f00085216d1
😎 Deploy Preview	https://deploy-preview-8398--kongdocs.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.
Lighthouse	9 paths audited Performance: 92 (🟢 up 2 from production) Accessibility: 92 (no change from production) Best Practices: 98 (🟢 up 8 from production) SEO: 99 (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.