Import code from previous AssetBuilder version

src/ZoneCommon/Zone/Stream/IZoneStream.h

@@ -0,0 +1,11 @@
+#pragma once
+#include "Zone/ZoneTypes.h"
+
+class IZoneStream
+{
+public:
+    virtual ~IZoneStream() = default;
+
+    virtual void PushBlock(block_t block) = 0;
+    virtual block_t PopBlock() = 0;
+};