This pull request refactors our TypeScript preflight check in preparation for dropping the `fork-ts-checker-webpack-plugin` plugin.
This will make reviewing the subsequent PR much easier.
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There is no behavior change, so the existing test should cover this adequately.
This pull request updates our TypeScript verification process to not wipe out potentially vital user comments.
Introducing a prompt process was mostly a side effect of users wanting to keep comments.
There's no reason we really need this prompt, as answering no would refuse to boot the Next.js server anyway.
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Fixes#8128Closes#11440
* Check for TypeScript files for auto setup
This re-adds the behavior and only checks the `pages` directory for speed reasons.
* Adjust logic
* Handle not found too
* Only read for typescript files if there's no tsconfig
* Update verifyTypeScriptSetup.ts
* Remove the recursive check for TS files
* Remove unused import
* Updated tests
* Add a check for the content of tsConfig
* Clean up
* utf8
