next.js

3eb38a9c - fix renaming of page files, add handling of symlinked pages (#68195)

fix renaming of page files, add handling of symlinked pages (#68195) ### What? When renaming a page from `page.js` to `page.tsx` it can temporarily have both variants which end up writing the same files. Also fixes symlinked page files Depends on https://github.com/vercel/turbo/pull/8851 fixes PACK-2718