Flagged Windows value converters as obsolete

Author: jamesmcroft

src/MADE.Data.Converters/BooleanToStringValueConverter.Windows.cs

@@ -13,6 +13,7 @@ namespace MADE.Data.Converters
     /// <summary>
     /// Defines a Windows components for a XAML value converter from <see cref="bool"/> to <see cref="string"/>.
     /// </summary>
+    [Obsolete("Use the replicated BooleanToStringValueConverter type from the MADE.UI.Data.Converters library instead.")]
     public class BooleanToStringValueConverter : DependencyObject, IValueConverter, IValueConverter<bool, string>
     {
         /// <summary>

src/MADE.Data.Converters/DateTimeToStringValueConverter.Windows.cs

@@ -10,6 +10,7 @@ namespace MADE.Data.Converters
     /// <summary>
     /// Defines a Windows components for a XAML value converter from <see cref="DateTime"/> to <see cref="string"/> with an optional format string.
     /// </summary>
+    [Obsolete("Use the replicated DateTimeToStringValueConverter type from the MADE.UI.Data.Converters library instead.")]
     public partial class DateTimeToStringValueConverter : IValueConverter
     {
         /// <summary>