feat: 增加 IDropdownItem 接口

Author: ArgoZhang

src/BootstrapBlazor/Components/Dropdown/IDropdownItem.cs

@@ -0,0 +1,14 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the Apache 2.0 License
+// See the LICENSE file in the project root for more information.
+// Maintainer: Argo Zhang(argo@live.ca) Website: https://www.blazor.zone
+
+namespace BootstrapBlazor.Components;
+
+/// <summary>
+/// IDropdownItem 接口
+/// </summary>
+public interface IDropdownItem
+{
+
+}