Storybook as repo documentation

[erikyo]

What problem does this address?

Actually we haven't a (easy to reach) user documentation

What is your proposed solution?

Using storybook we can create a little nicer documentation than the traditional one, and also we can show the components of the project and play with them. Using build-storybook -o docs/, should published and shown in the right panel of the Github repo home page

Here an example:
feature-notifications Storybook

[Sephsekla]

When this is merged I'll look at disabling the repo wiki - a lot of this is out of date anyway and we don't want to be maintaining duplicate docs.