Fix: Client should auto reload after server restarts (#83971)
Port the implementation from pages router to app router.
https://github.com/vercel/next.js/blob/27515900b31bfad83c3ecc65ed2e5d020ec289a6/packages/next/src/client/dev/hot-reloader/pages/websocket.ts
---------
Co-authored-by: devjiwonchoi <devjiwonchoi@gmail.com>
Co-authored-by: JJ Kasper <jj@jjsweb.site>
