fix sdl3 linking + comments

src/app/App.cpp

@@ -24,12 +24,10 @@ int App::run() {
 
     utils::debugPrint(__FUNCTION__, __LINE__, "Run app.", utils::DebugLevel::Trace);
 
-    engine_->exec();
-
     bool quit = false;
 	while (!quit) {
         // app loop for as long as the window is open
-        // other threads might be able to change quit to true to auto close
+        // other threads might be able to change quit to true to auto close in the future
 
         SDL_Event event;
         while(SDL_PollEvent(&event)) { // TODO: pass event handling to window