Add Ternary Search Magic Trick interactive and fix layout issues

- Create new Ternary Search Magic Trick interactive with ternary search logic
- Add emoji buttons and 'not present' option for better UX
- Implement 'How it Works' modal with embedded YouTube video
- Fix layout margins when accessing interactives from theme pages
- Add standalone and green screen pages for the new interactive
- Update Data Structures theme to include the new interactive

src/pages/theme-pages/DataStructures.tsx

@@ -1,14 +1,7 @@
-import Layout from "@/components/Layout";
 import InteractiveGallery from "@/components/InteractiveGallery";
 
 const DataStructures = () => {
-  return (
-    <Layout>
-      <div className="max-w-7xl mx-auto p-6">
-        <InteractiveGallery />
-      </div>
-    </Layout>
-  );
+  return <InteractiveGallery />;
 };
 
 export default DataStructures;