WIP moving difficulty selection to engine

Signed-off-by: Hans Kokx <hans.d.kokx@gmail.com>

apps/wolf_3d_cli/lib/cli_game_loop.dart

@@ -106,7 +106,8 @@ class CliGameLoop {
   }
 
   void _handleInput(List<int> bytes) {
-    if (bytes.contains(113) || bytes.contains(27)) {
+    // Keep q and Ctrl+C as hard exits; ESC is now menu-back input.
+    if (bytes.contains(113) || bytes.contains(3)) {
       stop();
       onExit(0);
       return;