fix(config): handle shebang properly

[sapphi-red]

fixes, #18871 (comment)

[bluwy]

I'm a bit confused of the original issue. Why would someone add a shebang to the config file?

[sapphi-red]

I think it is to run vite by ./vite.config.ts. To do that, you would need to add #!/usr/bin/env -S node ./node_modules/vite/bin/vite.js -c to the config.

[bluwy]

Hmm, feels a bit strange of a pattern but I guess it's not a lot of work to support it.