docs: add plugin setup guide

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

@@ -0,0 +1,17 @@
+#pragma once
+
+namespace RE
+{
+	class PACK_SCHED_DATA
+	{
+	public:
+		// members
+		std::int8_t  month;      // 0
+		std::int8_t  dayOfWeek;  // 1
+		std::int8_t  date;       // 2
+		std::int8_t  hour;       // 3
+		std::int8_t  min;        // 4
+		std::int32_t duration;   // 8
+	};
+	static_assert(sizeof(PACK_SCHED_DATA) == 0xC);
+}