feat: Mock react-scripts 'config' folder

[bencergazda]

react-scripts has a config folder that contains the base webpack or devServer configuration. Some 3rd party packages (like @storybook/preset-create-react-app) require these files, serving as a base for their own configuration.

This PR:

• removes the rewiring-related duplicated code fragments and move them to separate files
• adds the folder config/webpack.config.js, config/webpackDevServer.config.js and config/paths.config.js files that export the rewired configuration EVEN if we didn't call the react-app-rewired command.

This makes storybook (and probably many other packages) plug and play also for the rewired apps.

[timarney]

Thanks @bencergazda --- I think I'll spin up a "next" release for this for testing prior to a real release.

@dawnmist outside of ensuring this is backwards compatible any other thoughts?

[timarney]

Just published under "next tag" if anyone can test & confirm.

[timarney]

Some 3rd party packages (like @storybook/preset-create-react-app) require these files, serving as a base for their own configuration.

marged.

@bencergazda does this feel like a feature release to you or a patch

[bencergazda]

@timarney I'd rather say this is a feature!

[timarney]

Published 2.2.0

Thanks for the PRs

[bencergazda]

@timarney Sorry, but after the first install, I realized that we need to add /config to the files array in package.json. Otherwise npm publish strips that folder from the package. This problem didn't show up while installing the git repo. 😞

This doesn't affect the core functionality, but the mocked config folder won't be accessible until we fix this. Submitted #606 with the correction.