feat(storybook) : update storybook to version 5 and move packages to subdirectory

[samuel-gomez-axa]

Related issue

#111

I don't rewrite the stories.
Just update storybook and move packages installation to the sub package.json

Reference to the issue

#111

Description of the issue

Person(s) for reviewing proposed changes

@guillaumechervetaxa @guillaumechervet

Important

Before creating a pull request run unit tests

$ npm test

# watch for changes
$ 


# For a specific file (e.g., in packages/context/__tests__/command.test.js)
$ npm test -- --watch packages/action

[guillaumechervetaxa]

Perfect Samuel!