docs: add plugin setup guide

plugin/lib/commonlibf4/include/RE/I/IPostAnimationChannelUpdateFunctor.h

@@ -0,0 +1,17 @@
+#pragma once
+
+namespace RE
+{
+	class __declspec(novtable) IPostAnimationChannelUpdateFunctor
+	{
+	public:
+		static constexpr auto RTTI{ RTTI::IPostAnimationChannelUpdateFunctor };
+		static constexpr auto VTABLE{ VTABLE::IPostAnimationChannelUpdateFunctor };
+
+		virtual ~IPostAnimationChannelUpdateFunctor() = default;  // 00
+
+		// add
+		virtual void DoPostAnimationChannelUpdate() = 0;  // 01
+	};
+	static_assert(sizeof(IPostAnimationChannelUpdateFunctor) == 0x8);
+}