Make Northcott's Game standalone

Give Northcott's Game a unique ID and make it accessible as a standalone interactive.

src/pages/NorthcottsGamePage.tsx

@@ -0,0 +1,13 @@
+import NorthcottsGame from '@/components/NorthcottsGame';
+
+const NorthcottsGamePage = () => {
+  return (
+    <div className="min-h-screen bg-background">
+      <div className="container mx-auto px-4 py-8">
+        <NorthcottsGame showSocialShare={true} />
+      </div>
+    </div>
+  );
+};
+
+export default NorthcottsGamePage;