refactor: 增加初始化样式

Author: ArgoZhang

src/components/BootstrapBlazor.MeiliSearch/MeiliSearchBox.razor

@@ -5,7 +5,7 @@
 <div @attributes="@AdditionalAttributes" id="@Id" class="@ClassString">
     <i class="fa-solid fa-search search-dialog-icon"></i>
     <input type="text" readonly placeholder="@SearchBoxPlaceHolder" />
-    <div class="search-dialog-mask">
+    <div class="search-dialog-mask d-none">
         <div class="search-dialog shadow-lg" tabindex="0">
             <header class="search-dialog-input">
                 <i class="fa-solid fa-search"></i>

src/components/BootstrapBlazor.MeiliSearch/MeiliSearchBox.razor.cs

@@ -112,7 +112,7 @@ public partial class MeiliSearchBox
     [Parameter]
     public RenderFragment? FooterTemplate { get; set; }
 
-    private string? ClassString => CssBuilder.Default("bb-g-search")
+    private string? ClassString => CssBuilder.Default("bb-g-search visually-hidden")
         .AddClassFromAttributes(AdditionalAttributes)
         .Build();