re-add SDL_main.h header, windows performance is worse without it, pr…

…obably some SDL optimization because `main` is a define to SDL_main with it, but that's not the case on linux

src/CubeChip.cpp

@@ -4,6 +4,7 @@
 	file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */
 
+#include <SDL3/SDL_main.h>
 #include <SDL3/SDL.h>
 #include <SDL3/SDL_version.h>
 #include <optional>