build(deps): bump Docusaurus to v3

[TheCatLady]

Description

Bumps Docusaurus to v3. https://docusaurus.io/blog/releases/3.0

To-Dos

• Format with yarn format
• Lint with yarn lint
• Build successfully with yarn build:fast

Code of Conduct

By submitting this pull request, I agree to follow the code of conduct.

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Lighthouse	1 paths audited Performance: 56 (🟢 up 10 from production) Accessibility: 100 (no change from production) Best Practices: 100 (no change from production) SEO: 93 (no change from production) PWA: 90 (no change from production) View the detailed breakdown and full score reports

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