Added Storybook using JSX with UV demos

[stephenwf]

trafficstars

Support for Storybook using the HTML preset and JSX-DOM for rendering the HTML using JSX.

• Requires dist folder to exist, so you need to run npm build first
• Can be started using npm run storybook
• Will watch for changes in the UV, so can be used to develop it
• HTML file for pulling in extra resources
• Mounts the contents of ./dist so you can access configs and resources in that folder – before we switch that over the webpack too.
• Added "Knobs" add-on and hooked it up to the UV demo to switch out the Manifest and Canvas. Could be useful for building simple configuration editing examples.
• Added JSX support to TS configuration, along with JSX-DOM. When you construct a JSX element, the return value is a HTMLElement that can be immediately attached. (not React)
• Stories can be found in ./stories/ and can pull in files, classes from ../src relative to that folder.
• JS files that change may not be picked up when, such as jQuery plugins or lib folder. You'll have to restart to see these changes.

Mostly a baseline, I wanted to get the minimum configuration in, plenty more could be added for theming, add-ons and showcasing various other UI elements in isolation.

[stephenwf]

@demiankatz I was having some problems with the files being gitignored! Looks like the storybook config isn't there. Let me change that now 👍