优化更新代码，添加界面功能并整合

WPFluent/Converters/ColorToBrushConverter.cs

@@ -0,0 +1,21 @@
+using System;
+using System.Linq;
+using System.Windows.Data;
+
+namespace WPFluent.Converters;
+
+public class ColorToBrushConverter : IValueConverter
+{
+    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
+    {
+        //var color = (SelectedColor)value;
+        if(value is System.Windows.Media.Color color)
+        {
+            return new SolidColorBrush(color);
+        }
+        return Binding.DoNothing;
+    }
+
+    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
+    { throw new NotImplementedException(); }
+}