v0.3.0

Breaking: the default build no longer bundles the design system. Components now emit structural CSS plus a neutral token contract, so documents inherit your own design tokens. Pass --theme rr to opt back into the bundled Traverse look, or --css file.css to inline your own stylesheet.

• New --theme and --css flags on rr build
• New minimal static landing page at https://rr.hasanshoaib.com, with build-time syntax highlighting via shiki