docs: add plugin setup guide

plugin/lib/commonlibf4/include/Scaleform/L/LogMessageId.h

@@ -0,0 +1,18 @@
+#pragma once
+
+namespace Scaleform
+{
+	class LogMessageId
+	{
+	public:
+		LogMessageId(std::int32_t a_id) :
+			id(a_id)
+		{}
+
+		~LogMessageId() noexcept {}
+
+		// members
+		std::int32_t id;  // 0
+	};
+	static_assert(sizeof(LogMessageId) == 0x4);
+}