feat(site-builder): tablet/mobile canvas emulates published hide, stacking and full-width

Frame gets data-device; RenderNode mirrors hide flags and selection onto the
dom; editor.css emulates the exported breakpoints inside the narrowed frame.
Also: data-wsb-overridden counts only set values, responsive scope ids are
zone-prefixed (h-/b-/f-) so ROOT no longer collides, and comment delimiters
are stripped from responsive declarations.

Refs #37

craft/src/components/layout/Container.tsx

@@ -93,6 +93,7 @@ export const Container: UserComponent<ContainerProps> = ({
       ref: (ref: HTMLElement | null): void => { if (ref) connect(drag(ref)); },
       style: outerStyle,
       'data-craft-container': 'true',
+      'data-fullwidth': fullWidth ? '' : undefined,
       id: idValue,
       className: cssClass || undefined,
     },