turbo

b00eea28 - chore: update `basic` example to ESLint v9 and Flat Configurations. (#9501)

chore: update `basic` example to ESLint v9 and Flat Configurations. (#9501) ### 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.) --------- Co-authored-by: vincenthsh <111712068+vincenthsh@users.noreply.github.com>