Updates the service-worker package to export the worker script and
schema, so that these files can be resolved and included by consumers.
Additionally, the CLI bundle is updated to be using ESM as it
transitively relies on the `core` entry-point of the package which
already uses ESM. Also this is required because the script is part
of the the service-worker package which has `type: module` applied.
PR Close#43431
Paul Gschwendtner