Add XML comments to public entities.

Structs/Images.cs

@@ -167,6 +167,9 @@ namespace Aaru.CommonTypes.Structs
         /// <summary>Partition type</summary>
         public TrackType TrackType;
 
+        /// <summary>
+        /// Initializes an empty instance of this structure
+        /// </summary>
         public Track() => Indexes = new Dictionary<ushort, int>();
     }