docs: add plugin setup guide

plugin/lib/commonlibf4/include/RE/B/BSThreadEvent.h

@@ -0,0 +1,22 @@
+#pragma once
+
+namespace RE
+{
+	class BSThreadEvent
+	{
+	public:
+		enum class Event
+		{
+			kOnStartup = 0x0,
+			kOnShutdown = 0x1
+		};
+
+		static void InitSDM()
+		{
+			using func_t = decltype(&BSThreadEvent::InitSDM);
+			static REL::Relocation<func_t> func{ ID::BSThreadEvent::InitSDM };
+			return func();
+		}
+	};
+	static_assert(std::is_empty_v<BSThreadEvent>);
+}