docs: add plugin setup guide

plugin/lib/commonlibf4/include/RE/S/SunOcclusionTest.h

@@ -0,0 +1,19 @@
+#pragma once
+
+namespace RE
+{
+	class BSGaphics
+	{
+		class OcclussionQuery;
+	};
+
+	class SunOcclusionTest
+	{
+	public:
+		BSGraphics::OcclusionQuery* occlusionQuery;   // 00
+		float                       percentOccluded;  // 08
+		std::uint32_t               pixelCount;       // 0C
+		std::uint32_t               frameCount;       // 10
+		bool                        waiting;          // 14
+	};
+}