Fixed ASCII rasterizer, abstracted out input and audio, and created CLI client (untested)

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

packages/wolf_3d_synth/lib/src/silent_renderer.dart

@@ -0,0 +1,34 @@
+import 'package:wolf_3d_data_types/wolf_3d_data_types.dart';
+import 'package:wolf_3d_engine/wolf_3d_engine.dart';
+
+class CliSilentAudio implements EngineAudio {
+  @override
+  WolfensteinData? activeGame;
+
+  @override
+  Future<void> init() async {
+    // No-op for CLI
+  }
+
+  @override
+  void playMenuMusic() {}
+
+  @override
+  void playLevelMusic(WolfLevel level) {
+    // Optional: Print a log so you know it's working!
+    // print("🎵 Playing music for: ${level.name} 🎵");
+  }
+
+  @override
+  void stopMusic() {}
+
+  @override
+  void playSoundEffect(int sfxId) {
+    // Optional: You could use the terminal 'bell' character here
+    // to actually make a system beep when a sound plays!
+    // stdout.write('\x07');
+  }
+
+  @override
+  void dispose() {}
+}