view Vue component with mock data

Description

• Working on MR Widget a lot of the time you want to see it render some particular state.
• We have mock data for most states in spec directory
• hardcoding component code with mock data is hacky
• Mocking network requests in Chrome is tedious

Proposal

Add one of:

• storybook
• vue-play
• our own thing
• some kind of devtool that lets you change component state easily

Links / references

Working Vue example with storybook - https://github.com/storybooks/storybook/tree/add-app-vue/examples/vue-kitchen-sink

Documentation blurb

1. Storybook loads styles served from GDK, so GDK needs to be running on port 3000. For other ports, configure in .storybook/preview-head.html
2. run yarn storybook to start storybook dev server
3. visit localhost:6006 to see components rendered in isolation