feat: included ChromeDino in Board

lib/game/components/board.dart

@@ -29,9 +29,12 @@ class Board extends Component {
       ),
     );
 
+    final dino = ChromeDino()..initialPosition = _size / 2 + Vector2(0, -10);
+
     await addAll([
       bottomGroup,
       dashForest,
+      dino,
     ]);
   }
 }