Move DatItemTool to DatTools namespace

SabreTools.DatTools/Enums.cs

@@ -1,3 +1,5 @@
+using System;
+
 namespace SabreTools.DatTools
 {
     /// <summary>
@@ -32,4 +34,19 @@ namespace SabreTools.DatTools
         Archive,
         File,
     }
+
+    /// <summary>
+    /// Determines what sort of files only use external hashes
+    /// </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,
+    }
 }