docs: add plugin setup guide

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

@@ -0,0 +1,14 @@
+#pragma once
+
+namespace RE
+{
+	class __declspec(novtable) IMovementInterface
+	{
+	public:
+		static constexpr auto RTTI{ RTTI::IMovementInterface };
+		static constexpr auto VTABLE{ VTABLE::IMovementInterface };
+
+		virtual ~IMovementInterface() = default;  // 00
+	};
+	static_assert(sizeof(IMovementInterface) == 0x8);
+}