docs: add plugin setup guide

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

@@ -0,0 +1,16 @@
+#pragma once
+
+namespace RE
+{
+	enum class SCRIPT_PARAM_TYPE;
+
+	class SCRIPT_PARAMETER
+	{
+	public:
+		// members
+		const char*                                    paramName{ "" };    // 00
+		REX::TEnumSet<SCRIPT_PARAM_TYPE, std::int32_t> paramType;          // 08
+		bool                                           optional{ false };  // 0C
+	};
+	static_assert(sizeof(SCRIPT_PARAMETER) == 0x10);
+}