docs: add plugin setup guide

plugin/lib/commonlibf4/include/RE/B/BSPackedTaskQueue.h

@@ -0,0 +1,19 @@
+#pragma once
+
+#include "RE/B/BSTMessageQueue.h"
+
+namespace RE
+{
+	class BSPackedTask;
+
+	class BSPackedTaskQueue
+	{
+	public:
+		using UnpackFunc_t = void (*)(const BSPackedTask&);
+
+		// members
+		BSTCommonScrapHeapMessageQueue<BSPackedTask> queue;       // 00
+		UnpackFunc_t*                                unpackFunc;  // 28
+	};
+	static_assert(sizeof(BSPackedTaskQueue) == 0x30);
+}