docs: add plugin setup guide

plugin/lib/commonlibf4/include/RE/P/PlayerLifeStateChanged.h

@@ -0,0 +1,17 @@
+#pragma once
+
+namespace RE
+{
+	enum class ACTOR_LIFE_STATE;
+
+	namespace PlayerLifeStateChanged
+	{
+		class Event
+		{
+		public:
+			// members
+			ACTOR_LIFE_STATE lifeState;  // 00
+		};
+		static_assert(sizeof(Event) == 0x4);
+	}
+}