docs: add plugin setup guide

plugin/lib/commonlibf4/include/RE/H/hkBlockStream.h

@@ -0,0 +1,18 @@
+#pragma once
+
+#include "RE/H/hkBlockStreamBase.h"
+
+namespace RE
+{
+	template <class T>
+	class hkBlockStream :
+		public hkBlockStreamBase::Stream
+	{
+	public:
+		class Consumer;
+		class Modifier;
+		class Reader;
+		class Writer;
+	};
+	static_assert(sizeof(hkBlockStream<void>) == 0x100);
+}