Turn on storybook addons

The storybooks (make storybook-frontend and make storybook-editor) will become far more useful as style guides when they can include notes and code. They can also act as markup test with storyshots.

We should turn on storybook addons for at least:

• notes

• show story code on story

• storyshots (jest snapshot testing)

but also any others that are easy to turn on and look useful.