Add remote resource support to DEBUG tools

Source/GrasscutterTools/Game/TextMapData.cs

@@ -42,6 +42,7 @@ namespace GrasscutterTools.Game
 
         public TextMapData(string resourcesDirPath)
         {
+            ManualTextMap = new Dictionary<string, string>();
             LoadManualTextMap(Path.Combine(resourcesDirPath, "ExcelBinOutput", "ManualTextMapConfigData.json"));
             _textMapDirPath = Path.Combine(resourcesDirPath, "TextMap");
             LoadTextMaps(_textMapDirPath);
@@ -205,4 +206,4 @@ namespace GrasscutterTools.Game
             return false;
         }
     }
-}
+}