docs: add plugin setup guide

plugin/lib/commonlibf4/include/Scaleform/G/GFx_ResourceId.h

@@ -0,0 +1,13 @@
+#pragma once
+
+namespace Scaleform::GFx
+{
+	class ResourceId
+	{
+	public:
+		~ResourceId() noexcept {}
+
+		std::uint32_t id;  // 00
+	};
+	static_assert(sizeof(ResourceId) == 0x4);
+}