docs: add plugin setup guide

plugin/lib/commonlibf4/include/RE/T/TESQuestEvent.h

@@ -0,0 +1,23 @@
+#pragma once
+
+namespace RE
+{
+	namespace TESQuestEvent
+	{
+		enum Type : std::int32_t
+		{
+			kUpdateQuestActiveStatus = 0x0,
+			kUpdateQuestEnableStatus = 0x1,
+			kUpdateQuestStageChange = 0x2,
+			kUpdateMiscQuestVisibility = 0x3
+		};
+
+		class Event
+		{
+		public:
+			TESQuestEvent::Type changeType;  // 00
+			TESQuest*           quest;       // 08
+		};
+		static_assert(sizeof(Event) == 0x10);
+	}
+}