docs: add plugin setup guide

plugin/lib/commonlibf4/include/RE/R/RADIO_DATA.h

@@ -0,0 +1,15 @@
+#pragma once
+
+namespace RE
+{
+	class RADIO_DATA
+	{
+	public:
+		// members
+		float radioStation;         // 00
+		float minWeakSignalRange;   // 04
+		float maxWeakSignalRange;   // 08
+		bool  ignoreDistanceChekc;  // 0C
+	};
+	static_assert(sizeof(RADIO_DATA) == 0x10);
+}