Basic sdl3 support.

include/platforms/core_desktop_sdl2.h

@@ -0,0 +1,12 @@
+#pragma once
+
+// #define SDL_EVENT_QUEUE_LEN 128
+
+#include "SDL.h"
+
+// typedef struct {
+// 	int SDL_eventQueueLen;
+// 	SDL_Event** SDL_eventQueue;
+// } SDL_State;
+
+// extern SDL_State *SDL_state;