Add guessing game to data structures

Add the guessing game component to the "Data Structures and Algorithms" theme and update the index to include it.

src/pages/Index.tsx

@@ -7,6 +7,13 @@ import Layout from "@/components/Layout";
 
 // All interactives data
 const allInteractives = [{
+  id: 'guessing-game',
+  title: 'Number Guessing Game',
+  description: 'Experience different search algorithms through interactive gameplay. Compare random, linear, and binary search strategies!',
+  tags: ['algorithms', 'search', 'educational', 'interactive'],
+  path: '/games/guessing',
+  theme: 'Data Structures'
+}, {
   id: 'binary-number-game',
   title: 'Binary Number Representation',
   description: 'Learn how numbers are represented in binary (base-2) format through an interactive guessing game.',