next.js

5ea38767 - Turbopack: Add --experimental-server-fast-refresh CLI flag (#89274)

Turbopack: Add --experimental-server-fast-refresh CLI flag (#89274) This adds `--experimental-server-fast-refresh` CLI flag to enable experimental server-side Fast Refresh (HMR) during development. It's disabled by default. We call HMR "fast refresh" in public docs so let's keep the flag consistent with that. We use the HMR naming past this outer layer in the codebase. Test Plan: ```bash next dev --experimental-server-fast-refresh ```