fix: use internal alias that won't collide with user aliases

[benmccann]

closes #9009

[Rich-Harris]

Just noticed lint is failing - rescinding my approval!

[Rich-Harris]

The obvious solution would be to declare module '@sveltejs/kit/paths' but that would mean users see it. I don't think I see an alternative to adding // @ts-expect-error to every import

[Conduitry]

Can we switch to something like $$internal instead?

[Rich-Harris]

We could, though it only really downgrades the chance of collisions from 'unlikely' to 'very unlikely'

[benmccann]

Hmm. Yeah, I guess there's no way to have internal types 😝 I think I'd probably go with something really unique like __sveltekit_internal or whatever rather than trying to stick @ts-expect-error everywhere

[Rich-Harris]

It occurs to me that we're currently exposing $internal/paths along with 0SERVER and MANIFEST and various other things that shouldn't be exposed:

It would be nice to not do that. If that means a few // @ts-expect-error comments and a smidge less type safety I think it's a price worth paying

[benmccann]

I finally figured out how to make this work without exposing it or using ts-ignore

[Rich-Harris]

nice!