Add The Gold Coin Game - a strategic two-player game where players move coins to acquire the gold coin

src/components/InteractiveIndex.tsx

@@ -91,6 +91,15 @@ const allInteractives: Interactive[] = [
     theme: 'Puzzles',
     dateAdded: '2024-07-21'
   },
+  {
+    id: 'gold-coin',
+    title: 'The Gold Coin Game',
+    description: 'A strategic two-player game where you move coins to the left or take the leftmost coin. The player who takes the gold coin wins!',
+    tags: ['strategy', 'two-player', 'logic', 'game-theory', 'movement', 'coins'],
+    path: '/games/gold-coin',
+    theme: 'Games',
+    dateAdded: '2024-12-19'
+  },
   {
     id: 'assisted-nim',
     title: 'Assisted Game of Nim',