docs: add plugin setup guide

plugin/lib/commonlibf4/include/RE/S/SCRIPT_EFFECT_DATA.h

@@ -0,0 +1,14 @@
+#pragma once
+
+namespace RE
+{
+	class SCRIPT_EFFECT_DATA
+	{
+	public:
+		// members
+		bool  scriptEffectStart;   // 0
+		bool  scriptEffectFinish;  // 1
+		float secondsElapsed;      // 4
+	};
+	static_assert(sizeof(SCRIPT_EFFECT_DATA) == 0x8);
+}