web: [dev-server-storybook] v1 published files are wrong format

Since v1 of web dev server storybook, it no longer works due to wrong file formats.

> wds --config .storybook/server.config.mjs

file:///path/to/node_modules/@web/dev-server-storybook/index.mjs:2
import cjsEntrypoint from './dist/index.js';
       ^^^^^^^^^^^^^
SyntaxError: The requested module './dist/index.js' does not provide an export named 'default'
    at ModuleJob._instantiate (node:internal/modules/esm/module_job:124:21)
    at async ModuleJob.run (node:internal/modules/esm/module_job:190:5)

Main MJS entrypoint points to index.mjs:

// this file is autogenerated with the generate-mjs-dts-entrypoints script
import cjsEntrypoint from './dist/index.js';

const { storybookPlugin } = cjsEntrypoint;

export { storybookPlugin };

This is attempting to import a default import from a CJS file, which makes no sense:

• Why would MJS import from a CJS file
• There is no default export in that file, only named

I think something might have gone wrong in your build process in the v1 publish