优化更新代码，添加界面功能并整合

WPFluent/Controls/AutoSuggestBox/AutoSuggestionBoxTextChangeReason.cs

@@ -0,0 +1,26 @@
+
+
+
+// ReSharper disable once CheckNamespace
+namespace WPFluent.Controls;
+
+/// <summary>
+/// Provides data for the <see cref="AutoSuggestBox.TextChanged"/> event.
+/// </summary>
+public enum AutoSuggestionBoxTextChangeReason
+{
+    /// <summary>
+    /// The user edited the text.
+    /// </summary>
+    UserInput = 0,
+
+    /// <summary>
+    /// The text was changed via code.
+    /// </summary>
+    ProgrammaticChange = 1,
+
+    /// <summary>
+    /// The user selected one of the items in the auto-suggestion box.
+    /// </summary>
+    SuggestionChosen = 2,
+}