feat: support custom class attribute

Author: ArgoZhang

src/BootstrapBlazor/Components/Row/Row.razor

@@ -2,6 +2,6 @@
 @inherits BootstrapModuleComponentBase
 @attribute [BootstrapModuleAutoLoader(AutoInvokeDispose = false)]
 
-<div @attributes="@AdditionalAttributes" id="@Id" data-bb-toggle="row" data-bb-type="@RowType.ToDescriptionString()" data-bb-items="@ItemsPerRow.ToDescriptionString()" data-bb-colspan="@ColSpan" class="d-none">
+<div @attributes="@AdditionalAttributes" id="@Id" data-bb-toggle="row" data-bb-type="@RowType.ToDescriptionString()" data-bb-items="@ItemsPerRow.ToDescriptionString()" data-bb-colspan="@ColSpan" class="@ClassString">
     @ChildContent
 </div>

src/BootstrapBlazor/Components/Row/Row.razor.cs

@@ -6,7 +6,7 @@
 namespace BootstrapBlazor.Components;
 
 /// <summary>
-/// 
+/// Row 组件
 /// </summary>
 public partial class Row
 {
@@ -33,4 +33,8 @@ public partial class Row
     /// </summary>
     [Parameter]
     public RenderFragment? ChildContent { get; set; }
+
+    private string? ClassString => CssBuilder.Default("d-none")
+        .AddClassFromAttributes(AdditionalAttributes)
+        .Build();
 }