Add project files.

Texture2DDecoderNative/unitycrunch.h

@@ -0,0 +1,5 @@
+#pragma once
+
+#include <stdint.h>
+
+bool unity_crunch_unpack_level(const uint8_t* data, uint32_t data_size, uint32_t level_index, void** ret, uint32_t* ret_size);