Add Sunny Lines Puzzle - IMO 2025 P6 interactive with grid snapping and line extension

src/pages/SunnyLinesPuzzlePage.tsx

@@ -0,0 +1,12 @@
+import React from 'react';
+import SunnyLinesPuzzle from '@/components/SunnyLinesPuzzle';
+
+const SunnyLinesPuzzlePage: React.FC = () => {
+  return (
+    <div className="min-h-screen bg-background">
+      <SunnyLinesPuzzle showSocialShare={true} />
+    </div>
+  );
+};
+
+export default SunnyLinesPuzzlePage;