docs: add plugin setup guide

plugin/lib/commonlibf4/include/Scaleform/W/WaitCondition.h

@@ -0,0 +1,16 @@
+#pragma once
+
+namespace Scaleform
+{
+	class WaitConditionImpl;
+
+	class WaitCondition
+	{
+	public:
+		~WaitCondition() noexcept {}
+
+		// members
+		WaitConditionImpl* impl;  // 00
+	};
+	static_assert(sizeof(WaitCondition) == 0x8);
+}