chore: minimize pnpm-lock.yaml diff to the create importer change only

The branch's lockfile had picked up ~500 lines of unrelated upstream drift
(module-federation 3.5.0→3.6.0, postcss peer refreshes) from an install
against an older main. Restore the lockfile to main's baseline and re-add only
the change this PR needs: the @scripts/rstest-config workspace link for the
create importer.

Co-Authored-By: Riff

Author: keepview