Component feature: add storybook #12
Description
🙋 Feature Request
[Storybook] is very common and useful tool.
We want to add this feature to our component generator.
🤔 Expected Behavior
Add a flag for creating storybook file under the component folder.
The component name should written like this {{name}}.stories.{{language}}.
Important note.
Please check if the user's package.json contains storybook dependency. (Show warning)