Add scenario-modeler-server example

Demo MCP App for SaaS financial planning with:
- Interactive sliders for MRR, growth, churn, margin, and costs
- 12-month projection charts (MRR, Gross Profit, Net Profit)
- 5 pre-built scenario templates (Bootstrapped, VC Rocketship, etc.)
- Template comparison overlay for strategy analysis
- Light/dark theme support

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

examples/scenario-modeler-server/src/components/MetricCard.tsx

@@ -0,0 +1,18 @@
+interface MetricCardProps {
+  label: string;
+  value: string;
+  variant?: "default" | "positive" | "negative";
+}
+
+export function MetricCard({
+  label,
+  value,
+  variant = "default",
+}: MetricCardProps) {
+  return (
+    <div className={`metric-card metric-card--${variant}`}>
+      <span className="metric-value">{value}</span>
+      <span className="metric-label">{label}</span>
+    </div>
+  );
+}