Some more general cleanup.

Penumbra.GameData/Structs/ActorWeapon.cs

@@ -0,0 +1,16 @@
+using System.Runtime.InteropServices;
+
+namespace Penumbra.GameData.Structs
+{
+    [StructLayout( LayoutKind.Sequential, Pack = 1 )]
+    public readonly struct ActorWeapon
+    {
+        public readonly SetId      Set;
+        public readonly WeaponType Type;
+        public readonly ushort     Variant;
+        public readonly StainId    Stain;
+
+        public override string ToString()
+            => $"{Set},{Type},{Variant},{Stain}";
+    }
+}