add gui test engine to yaze_test for integration tests

src/test/yaze_test.cc

@@ -1,4 +1,6 @@
 #define SDL_MAIN_HANDLED
+
+#include <SDL.h>
 #include <gtest/gtest.h>
 
 #include "absl/debugging/failure_signal_handler.h"
@@ -9,6 +11,16 @@ int main(int argc, char* argv[]) {
 
   absl::FailureSignalHandlerOptions options;
   absl::InstallFailureSignalHandler(options);
+
+  // Support the ability to launch an integration test window.
+  SDL_SetMainReady();
+
+  // Check if the argument says `integration`
+  if (argc > 1 && std::string(argv[1]) == "integration") {
+    // TODO: Create the debugging window with the test engine.
+    return EXIT_SUCCESS;
+  }
+
   ::testing::InitGoogleTest(&argc, argv);
   return RUN_ALL_TESTS();
 }