This follows on PR #2227.
Satisfy new peer dependencies following the bumps: `@storybook/core`,
`regenerator-runtime`.
Follow storybook's instructions to add `@storybook/preset-create-react-app` as
a dependency and also add the needed `.storybook/main.js` in
`packages/cockpit/ui/`.
Storybook is sensitive to presets being in the immediate project's
`node_modules` so add a `"nohoist"` in the root `package.json` for
`"embark-ui/@storybook/**"`.
After making the changes above, problems related to babel were observed when
running `yarn start`. It has been known for some time that having the root
babel config's dependencies spec'd in
`packages/utils/collective/package.json` (which is the package that actually
drives the babel cli) could lead to problems related to deduping, but such
problems hadn't been experienced until now. Move the dependencies relevant to
the root `babel.config.js` into the root `package.json` and update the
explanatory comment in the config.
Michael Bradley, Jr