chore(precompile): re-add `watchpack` to the precompile (#60309)
Per @styfle suggestion, #58038 has been split into multiple PRs for
easier review.
- Re-add precompile `watchpack`
- Next.js has stopped bundling the `watchpack` since
https://github.com/vercel/next.js/pull/50792. Currently, `watchpack` is
a direct dependency of Next.js. The PR adds the pre-compile back.
Co-authored-by: Steven <steven@ceriously.com>