优化更新代码，添加界面功能并整合

WPFluent/Controls/NavigationView/NavigationViewPaneDisplayMode.cs

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+
+
+
+// Based on Windows UI Library
+// Copyright(c) Microsoft Corporation.All rights reserved.
+
+// ReSharper disable once CheckNamespace
+namespace WPFluent.Controls;
+
+/// <summary>
+/// Defines constants that specify how and where the NavigationView pane is shown.
+/// </summary>
+public enum NavigationViewPaneDisplayMode
+{
+    /// <summary>
+    /// The pane is shown on the left side of the control.
+    /// </summary>
+    Left,
+
+    /// <summary>
+    /// The pane is shown on the left side of the control. Only the pane icons are shown.
+    /// </summary>
+    LeftMinimal,
+
+    /// <summary>
+    /// The pane is shown on the left side of the control. Large icons with titles underneath are the only display
+    /// option. Does not support <see cref="NavigationViewItem.MenuItems"/>. <para>Similar to the Windows Store (2022)
+    /// app.</para>
+    /// </summary>
+    LeftFluent,
+
+    /// <summary>
+    /// The pane is shown at the top of the control.
+    /// </summary>
+    Top,
+
+    /// <summary>
+    /// The pane is shown at the bottom of the control.
+    /// </summary>
+    Bottom,
+}