fix: make type-checking work in Yarn PnP

[Josh-Cena]

Pre-flight checklist

• I have read the Contributing Guidelines on pull requests.
• If this is a code change: I have written unit tests and/or added dogfooding pages to fully verify the new behavior.
• If this is a new API or substantial change: the PR has an accompanying issue (closes Yarn PNP and TypeScript doesn't compile out of the box #6157, doesn't close, just makes it much better) and the maintainers have approved on my working plan.

Motivation

Added a bunch of dependency declarations. node_modules size shouldn't be a big concern, since these things are now transitively installed in the init template anyway.

Test Plan

Test links

Deploy preview: https://deploy-preview-_____--docusaurus-2.netlify.app/

Related issues/PRs

[netlify]

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[github-actions]

⚡️ Lighthouse report for the deploy preview of this PR

URL	Performance	Accessibility	Best Practices	SEO	PWA	Report
/	🟠 73	🟢 100	🟢 100	🟢 100	🟢 90	Report
/docs/installation	🟠 87	🟢 99	🟢 100	🟢 100	🟢 90	Report

[github-actions]

Size Change: 0 B

Total Size: 797 kB

ℹ️ View Unchanged

Filename	Size
website/.docusaurus/globalData.json	52.5 kB
website/build/assets/css/styles.********.css	106 kB
website/build/assets/js/main.********.js	600 kB
website/build/index.html	38.9 kB

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