docs: add plugin setup guide

plugin/lib/commonlibf4/include/RE/H/hkAabb16.h

@@ -0,0 +1,15 @@
+#pragma once
+
+namespace RE
+{
+	class hkAabb16
+	{
+	public:
+		// members
+		std::uint16_t min[3];
+		std::uint16_t key;
+		std::uint16_t max[3];
+		std::uint16_t key1;
+	};
+	static_assert(sizeof(hkAabb16) == 0x10);
+}