feat: add DeFi quiz [Fixes #13648]

[Shiva-Sai-ssb]

Description

I've added the quiz for DeFi on the quiz page as well as on the DeFi page.

Related Issue

Closes #13648

[netlify[bot]]

✅ Deploy Preview for ethereumorg ready!

Name	Link
🔨 Latest commit	aeab35c811b5af84d1f0f63c473831a221514d4a
🔍 Latest deploy log	https://app.netlify.com/sites/ethereumorg/deploys/6707833e6ad92e00089cf76b
😎 Deploy Preview	https://deploy-preview-14100--ethereumorg.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.
Lighthouse	7 paths audited Performance: 48 (🔴 down 5 from production) Accessibility: 93 (no change from production) Best Practices: 89 (🔴 down 9 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.

[corwintines]

LGTM, thanks @Shiva-Sai-ssb!