优化更新代码，添加界面功能并整合

WPFluent/Controls/InfoBar/InfoBarSeverity.cs

@@ -0,0 +1,30 @@
+
+
+
+// ReSharper disable once CheckNamespace
+namespace WPFluent.Controls;
+
+public enum InfoBarSeverity
+{
+    /// <summary>
+    /// Communicates that the InfoBar is displaying general information that requires the user's attention.
+    /// </summary>
+    Informational = 0,
+
+    /// <summary>
+    /// Communicates that the InfoBar is displaying information regarding a long-running and/or background task that has
+    /// completed successfully.
+    /// </summary>
+    Success = 1,
+
+    /// <summary>
+    /// Communicates that the InfoBar is displaying information regarding a condition that might cause a problem in the
+    /// future.
+    /// </summary>
+    Warning = 2,
+
+    /// <summary>
+    /// Communicates that the InfoBar is displaying information regarding an error or problem that has occurred.
+    /// </summary>
+    Error = 3,
+}