chore: update `basic` example to ESLint v9 and Flat Configurations.

[anthonyshew]

Description

This PR converts our basic example to ESLint v9 with Flat Configurations.

I may have a few gray hairs now, but I'm very excited for the community to have this.

Testing Instructions

Use npx create-turbo@canary -e https://github.com/vercel/turborepo/tree/shew-409f3/examples/basic basic-eslint-9 to try it out.

• Pull it down, make sure you see diagnostics where you'd expect in your editor. Including for eslint-config-turbo, most importantly!
• I know the diff is big, but there may be vestigials from my experimenting lying around. Please use a finely toothed comb! (I've looked myself but the more eyes, the better.)

[vercel[bot]]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Comments	Updated (UTC)
examples-basic-web	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Nov 23, 2024 4:08am
examples-nonmonorepo	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Nov 23, 2024 4:08am

7 Skipped Deployments

| Name | Status | Preview | Comments | Updated (UTC) | | :--- | :----- | :------ | :------- | :------ | | **examples-designsystem-docs** | ⬜️ Ignored ([Inspect](https://vercel.com/vercel/examples-designsystem-docs/ErEyjQYbNsz5rhSfDDmoQR5gtpP4)) | [Visit Preview](https://examples-designsystem-docs-git-shew-409f3.vercel.sh) | | Nov 23, 2024 4:08am | | **examples-gatsby-web** | ⬜️ Ignored ([Inspect](https://vercel.com/vercel/examples-gatsby-web/Htj5TcJTBSq14vsdbCzBvELaCHRG)) | [Visit Preview](https://examples-gatsby-web-git-shew-409f3.vercel.sh) | | Nov 23, 2024 4:08am | | **examples-kitchensink-blog** | ⬜️ Ignored ([Inspect](https://vercel.com/vercel/examples-kitchensink-blog/Ao3mwemJguDMVU33nqhhhCef5Wca)) | [Visit Preview](https://examples-kitchensink-blog-git-shew-409f3.vercel.sh) | | Nov 23, 2024 4:08am | | **examples-native-web** | ⬜️ Ignored ([Inspect](https://vercel.com/vercel/examples-native-web/Bz8sege4ir9SfoKYJqF7y5y7Uy6Z)) | [Visit Preview](https://examples-native-web-git-shew-409f3.vercel.sh) | | Nov 23, 2024 4:08am | | **examples-svelte-web** | ⬜️ Ignored ([Inspect](https://vercel.com/vercel/examples-svelte-web/B8mh4Gysaqp56VWUJR6Qpq6YkZsb)) | [Visit Preview](https://examples-svelte-web-git-shew-409f3.vercel.sh) | | Nov 23, 2024 4:08am | | **examples-tailwind-web** | ⬜️ Ignored ([Inspect](https://vercel.com/vercel/examples-tailwind-web/7Hdu8nYwRa2t23S1bGUrJ3cGpCJn)) | [Visit Preview](https://examples-tailwind-web-git-shew-409f3.vercel.sh) | | Nov 23, 2024 4:08am | | **examples-vite-web** | ⬜️ Ignored ([Inspect](https://vercel.com/vercel/examples-vite-web/2CXY2FJpz6RY2GH6rXVRo2AA8N7x)) | [Visit Preview](https://examples-vite-web-git-shew-409f3.vercel.sh) | | Nov 23, 2024 4:08am |

[socket-security[bot]]

New and removed dependencies detected. Learn more about Socket for GitHub ↗︎

Package	New capabilities	Transitives	Size	Publisher
npm/@typescript-eslint/eslint-plugin@8.15.0	None	+7	4.56 MB	bradzacher, jameshenry
npm/@typescript-eslint/parser@8.15.0	None	+5	1.44 MB	bradzacher, jameshenry
npm/eslint@9.15.0	environment Transitive: filesystem	+16	5.2 MB	eslintbot
npm/globals@15.12.0	None	0	176 kB	sindresorhus
npm/typescript-eslint@8.15.0	None	+6	1.81 MB	jameshenry

🚮 Removed packages: npm/turbo@2.3.0

View full report↗︎