Move Replacer to Filtering namespace

SabreTools.DatTools/DatFileTool.cs

@@ -6,6 +6,7 @@ using System.Threading.Tasks;
 using SabreTools.Core;
 using SabreTools.DatFiles;
 using SabreTools.DatItems;
+using SabreTools.Filtering;
 using SabreTools.IO;
 using SabreTools.Logging;
 

SabreTools.Filtering/Replacer.cs

@@ -3,7 +3,7 @@ using System.Collections.Generic;
 using SabreTools.Core;
 using SabreTools.DatItems;
 
-namespace SabreTools.DatTools
+namespace SabreTools.Filtering
 {
     /// <summary>
     /// Replace fields in DatItems

SabreTools.Test/Filtering/ReplacerTests.cs

@@ -2,10 +2,10 @@ using System.Collections.Generic;
 
 using SabreTools.Core;
 using SabreTools.DatItems;
-using SabreTools.DatTools;
+using SabreTools.Filtering;
 using Xunit;
 
-namespace SabreTools.Test.DatTools
+namespace SabreTools.Test.Filtering
 {
     public class ReplacerTests
     {