docs: add plugin setup guide

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

@@ -0,0 +1,17 @@
+#pragma once
+
+namespace RE
+{
+	class BSIStream;
+
+	class __declspec(novtable) BSReloadShaderI
+	{
+	public:
+		static constexpr auto RTTI{ RTTI::BSReloadShaderI };
+		static constexpr auto VTABLE{ VTABLE::BSReloadShaderI };
+
+		// add
+		virtual void ReloadShaders(BSIStream* a_stream) = 0;  // 00
+	};
+	static_assert(sizeof(BSReloadShaderI) == 0x8);
+}