start the process of making sync objects an extension

projects/extensions/synchronization/semaphore/gryphn_semaphore.h

@@ -0,0 +1,15 @@
+#pragma once
+#include "utils/gryphn_error_code.h"
+#include "utils/lists/gryphn_array_list.h"
+#include "gryphn_handles.h"
+
+#ifdef GN_REVEAL_IMPL
+struct gnSemaphore_t {
+    struct gnPlatformSemaphore_t* semaphore;
+    gnOutputDeviceHandle device;
+};
+#endif
+GN_ARRAY_LIST(gnSemaphore);
+
+gnReturnCode gnCreateSemaphore(gnSemaphore* semaphore, struct gnOutputDevice_t* device);
+void gnDestroySemaphore(gnSemaphore semaphore);