docs: add plugin setup guide

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

@@ -0,0 +1,18 @@
+#pragma once
+
+#include "RE/P/POWER_ARMOR_HUD_VISIBILITY_RULE.h"
+
+namespace RE
+{
+	class HUDModeType;
+
+	class HUDModeInitParams
+	{
+	public:
+		// members
+		const HUDModeType*              validHUDModes;                // 00
+		std::uint32_t                   numHUDModes;                  // 08
+		POWER_ARMOR_HUD_VISIBILITY_RULE powerArmorHUDVisibilityRule;  // 0C
+	};
+	static_assert(sizeof(HUDModeInitParams) == 0x10);
+}