feat: added HUD class

modules/wave_survival/heads_up_display.cpp

@@ -0,0 +1,23 @@
+#include "heads_up_display.h"
+
+void HeadsUpDisplay::_bind_methods() {
+}
+
+void HeadsUpDisplay::enter_tree() {
+}
+
+void HeadsUpDisplay::_notification(int what) {
+	if (Engine::get_singleton()->is_editor_hint()) {
+		return;
+	}
+	switch (what) {
+		default:
+			return;
+		case NOTIFICATION_ENTER_TREE:
+			enter_tree();
+			return;
+	}
+}
+
+void HeadsUpDisplay::set_reticle_visibility(bool visible) {
+}