docs: add plugin setup guide

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

@@ -0,0 +1,14 @@
+#pragma once
+
+namespace RE
+{
+	class BGSStoryEvent
+	{
+	public:
+		// members
+		std::uint32_t id;              // 00
+		std::uint32_t index;           // 04
+		std::uint64_t memberArray[6];  // 08
+	};
+	static_assert(sizeof(BGSStoryEvent) == 0x38);
+}