refactor components to a lib folder (like the storybook repo)

[dannyhw]

I think it would be cool to have the components together they can be re-usable. The addons panel for example would be worth re-using. This should make ondevice addons easier to develop.

in the storybook repo they have a folder like this

lib/components/src/addon-panel/

this is the package @storybook/components

we can do a similar thing for react native

I think there are other things that could later move to this lib folder like the theming