include files with required types directly

include/SDL3/SDL_keyboard.h

@@ -31,6 +31,9 @@
 #include <SDL3/SDL_stdinc.h>
 #include <SDL3/SDL_error.h>
 #include <SDL3/SDL_keycode.h>
+#include <SDL3/SDL_properties.h>
+#include <SDL3/SDL_rect.h>
+#include <SDL3/SDL_scancode.h>
 #include <SDL3/SDL_video.h>
 
 #include <SDL3/SDL_begin_code.h>