chore: migrate Jest and website to SWC

[Josh-Cena]

Motivation

Jest and website now share the same infrastructure. Next step is to convert the MDX loader to use SWC for its transformation as well.

Have you read the Contributing Guidelines on pull requests?

Yes

[netlify]

✅ [V2]

🔨 Explore the source changes: b35d283

🔍 Inspect the deploy log: https://app.netlify.com/sites/docusaurus-2/deploys/6235cd98a416ac0009ce274e

😎 Browse the preview: https://deploy-preview-6944--docusaurus-2.netlify.app

[github-actions]

⚡️ Lighthouse report for the changes in this PR:

Category	Score
🔴 Performance	44
🟢 Accessibility	100
🟢 Best practices	92
🟢 SEO	100
🟢 PWA	90

Lighthouse ran on https://deploy-preview-6944--docusaurus-2.netlify.app/

[github-actions]

Size Change: +1.46 kB (0%)

Total Size: 805 kB

Filename	Size	Change
website/build/assets/js/main.********.js	612 kB	+1.46 kB (0%)

ℹ️ View Unchanged

Filename	Size
website/.docusaurus/globalData.json	49.9 kB
website/build/assets/css/styles.********.css	105 kB
website/build/index.html	38.8 kB

_{compressed-size-action}

[slorber]

nice

did you notice any perf improvement?

[Josh-Cena]

No, the perf was unimpressive. Jest still runs for ~9s (which is pretty fast anyways), and not sure how much is thanks to cache.