Add Subtraction Game interactive

Implement "The Subtraction Game" interactive with sliders for n and k, a play/reset button, turn-based gameplay between two players, and visual feedback including confetti for the winner.

src/pages/SubtractionGamePage.tsx

@@ -0,0 +1,7 @@
+import SubtractionGame from '@/components/SubtractionGame';
+
+const SubtractionGamePage = () => {
+  return <SubtractionGame />;
+};
+
+export default SubtractionGamePage;