Move TreatAsFile up a library layer

SabreTools.FileTypes/Enums.cs

@@ -1245,19 +1245,4 @@ namespace SabreTools.FileTypes
         Torrent7Zip,
         TorrentRar,
     }
-
-    /// <summary>
-    /// Determines what sort of files get externally hashed
-    /// </summary>
-    /// TODO: Can FileType be used instead?
-    [Flags]
-    public enum TreatAsFile
-    {
-        CHD = 1 << 0,
-        Archive = 1 << 1,
-        AaruFormat = 1 << 2,
-
-        NonArchive = CHD | AaruFormat,
-        All = CHD | Archive | AaruFormat,
-    }
 }