New doc system

[KTibow]

• move documentation, demo data, how components interact, and other content to source code
• upgrade parser so it can generate component demos directly from component source
• no more "code"/example button, no more separate guide. instead, implement side sheets, add a button to open docs in a side sheet, and make the docs include a basic example, a representative example (using all props), and a link to the component.
• use the scribble font
• make the old component guide just link back