docs: add plugin setup guide

plugin/lib/commonlibf4/include/RE/T/TEXTURE_HAVOK_DATA.h

@@ -0,0 +1,13 @@
+#pragma once
+
+namespace RE
+{
+	class TEXTURE_HAVOK_DATA
+	{
+	public:
+		// members
+		std::int8_t friction;     // 0
+		std::int8_t restitution;  // 1
+	};
+	static_assert(sizeof(TEXTURE_HAVOK_DATA) == 0x2);
+}