优化更新代码，添加界面功能并整合

WPFluent/Controls/IAppearanceControl.cs

@@ -0,0 +1,15 @@
+
+
+
+namespace WPFluent.Controls;
+
+/// <summary>
+/// UI <see cref="System.Windows.Controls.Control"/> with <see cref="ControlAppearance"/> attributes.
+/// </summary>
+public interface IAppearanceControl
+{
+    /// <summary>
+    /// Gets or sets the <see cref="Appearance"/> of the control, if available.
+    /// </summary>
+    public ControlAppearance Appearance { get; set; }
+}