feat: release design system engine, studio and component contracts

examples/component-showcase/app/pages/fonts.wrn

@@ -11,7 +11,7 @@ page FontsGuide {
       <section class="guide-section"><h2>Overview</h2><p>Select a font family globally while components continue to inherit typography correctly.</p></section><section class="guide-section"><h2>Configuration</h2><p>Use the design switcher in the header to test this setting live.</p></section><section class="guide-section"><h2>Component behavior</h2><p>The setting is inherited by components, blocks, templates, and playground previews.</p></section>
       <section class="guide-section"><h2>Set one application font</h2><p>Components inherit the shared font family. Supply a font stack once; use font weights and spacing to establish hierarchy instead of enlarging every label.</p><pre><code>:root <span>&#123;</span> --wrn-font-sans: "Inter", system-ui, sans-serif; <span>&#125;</span>
 body <span>&#123;</span> font-family: var(--wrn-font-sans); <span>&#125;</span></code></pre><h3>Verify the result</h3><p>Open the matching component page, change its options, and try the keyboard controls. Copy the demonstrated configuration into your page, then replace sample content with your data.</p></section>
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     </article>
   }