docs: add plugin setup guide

plugin/lib/commonlibf4/include/RE/B/BSShaderUtil.h

@@ -0,0 +1,17 @@
+#pragma once
+
+namespace RE
+{
+	class NiAvObject;
+	class NiSwitchNode;
+
+	namespace BSShaderUtil
+	{
+		inline void SetMaterialAlpha(NiAvObject* a_object, float a_alpha, bool a_onlyFade)
+		{
+			using func_t = decltype(&BSShaderUtil::SetMaterialAlpha);
+			static REL::Relocation<func_t> func{ ID::BSShaderUtil::SetMaterialAlpha };
+			return func(a_object, a_alpha, a_onlyFade);
+		}
+	}
+}