docs: add plugin setup guide

plugin/lib/commonlibf4/include/RE/P/PerkData.h

@@ -0,0 +1,16 @@
+#pragma once
+
+namespace RE
+{
+	class PerkData
+	{
+	public:
+		// members
+		bool        trait;     // 0
+		std::int8_t level;     // 1
+		std::int8_t numRanks;  // 2
+		bool        playable;  // 3
+		bool        hidden;    // 4
+	};
+	static_assert(sizeof(PerkData) == 0x5);
+}