Change Style guide to Storybook

[JiwoonKim]

Considering maybe changing the style guide for the project from styleguidist to storybook

Style guide Usages:

• building UI components
• document usages of components
• testing examples of data for components

References

• styleguidist: https://react-styleguidist.js.org/
• storybook: https://storybook.js.org/

[JiwoonKim]

Since the current 5.2 version of Storybook uses .storybook/ folder for configurations, we are not able to use the storybook.config.js file method which exports a preset.

At the moment, customizing Storybook's webpack setup requires creating its own webpack.config.js file under the .storybook/ folder since Storybook has its own Webpack setup and a dev server. Further customizations can be referred from https://storybook.js.org/docs/configurations/custom-webpack-config/#webpack-customisation-modes/ .

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Luckily, Storybook is in the progress of implementing a storybook.config.js file that exports a preset for the upcoming v6.0.0 (storybookjs/storybook#6806)! Once this feature is fully implemented, it will be easier to hook Storybook with neutrino's preset configs (if webpack customization is necessary at all) 🌈 .

[JiwoonKim]

closed by #39 and opened new issue to continue in #55 😄