feat: release design system engine, studio and component contracts

examples/component-showcase/app/pages/components/metric-card.wrn

@@ -88,7 +88,7 @@ page MetricCardDetail {
         <div class="demo-workbench">
           <div id="metric-card-demo-1" class="demo-canvas demo-canvas--1">
             <div class="demo-browser-chrome"><span></span><span></span><span></span><small>Live preview</small></div>
-            
+
             <div class="demo-render"><MetricCard label="Availability" value="99.9" description="Target service availability." icon="icon-[lucide--activity]" suffix="%" trend="Stable" trendLabel="30 days" trendDirection="positive" progress="-1" progressLabel="Metric Card" href="#status" external="false" actionLabel="Open status" showArrow="true" selectable="false" disabled="false" size="default" color="success" variant="default" align="start" class="showcase-instance showcase-instance--1" /></div>
           </div>
           <section class="demo-code" aria-label="Operational KPI usage">
@@ -122,7 +122,7 @@ page MetricCardDetail {
         <div class="demo-workbench">
           <div id="metric-card-demo-2" class="demo-canvas demo-canvas--2">
             <div class="demo-browser-chrome"><span></span><span></span><span></span><small>Live preview</small></div>
-            
+
             <div class="demo-render"><MetricCard label="Profile completion" value="72" description="Complete the remaining account and security steps." icon="icon-[lucide--circle-user-round]" suffix="%" trendLabel="Compact example" progress="72" progressLabel="Account setup" href="#metric-card-demo" external="false" actionLabel="Compact example" showArrow="true" selectable="false" disabled="false" size="sm" color="info" variant="soft" align="center" class="showcase-instance showcase-instance--2" /></div>
           </div>
           <section class="demo-code" aria-label="Progress metric usage">
@@ -157,7 +157,7 @@ page MetricCardDetail {
         <div class="demo-workbench">
           <div id="metric-card-demo-3" class="demo-canvas demo-canvas--3">
             <div class="demo-browser-chrome"><span></span><span></span><span></span><small>Live preview</small></div>
-            
+
             <div class="demo-render"><MetricCard label="Open complaints" value="38" description="Cases waiting for review or assignment." icon="icon-[lucide--inbox]" badge="Needs review" trendLabel="Advanced example" progress="-1" progressLabel="Advanced example" href="#queue" external="false" actionLabel="Review queue" showArrow="true" selectable="true" disabled="false" size="lg" color="warning" variant="raised" hover="glow" align="end" class="showcase-instance showcase-instance--3" /></div>
           </div>
           <section class="demo-code" aria-label="Selectable dashboard metric usage">