add plot component to create

[trebor]

create a plot component that is used in the create to show how components work.

[Fil]

I'm a bit weary of adding a layer of abstraction on top of Plot in general—Plot is supposed to be concise and expressive enough for most use cases. There are a few cases though where it's proven to be very helpful. For example for a calendar. We have two versions: one based on Plot, the other on D3. In both cases it's difficult to make "by hand" so a component is helpful when compared to "raw" Plot or D3.

[mbostock]

This is a demonstration of how components/imports work, not an abstraction on top of Plot. This is simply about pulling JavaScript code out of Markdown and into a standalone JavaScript module that you can import across multiple pages.