[Accessibility] Fix of the unannounced Required keyword with FluentSelect

src/Core/Components/List/FluentSelect.razor

@@ -3,7 +3,7 @@
 @typeparam TOption
 <CascadingValue Value="_internalListContext" Name="ListContext" TValue="InternalListContext<TOption>" IsFixed="true">
     @InlineStyleValue
-    <FluentInputLabel ForId="@Id" Label="@Label" AriaLabel="@AriaLabel" Required="@Required" ChildContent="@LabelTemplate" />
+    <FluentInputLabel ForId="@Id" Label="@Label" AriaLabel="@GetAriaLabelWithRequired()" Required="@Required" ChildContent="@LabelTemplate" />
     <fluent-select @ref=Element
                    id=@Id
                    class="@ClassValue"

src/Core/Components/List/FluentSelect.razor.cs

@@ -6,6 +6,11 @@
 [CascadingTypeParameter(nameof(TOption))]
 public partial class FluentSelect<TOption> : ListComponentBase<TOption> where TOption : notnull
 {
+    /// <summary>
+    /// Gets the `Required` aria label.
+    /// </summary>
+    public static string RequiredAriaLabel = "Required";
+
     /// <summary />
     protected virtual MarkupString InlineStyleValue => new InlineStyleBuilder()
         .AddStyle($"#{Id}::part(listbox)", "max-height", Height, !string.IsNullOrWhiteSpace(Height))
@@ -39,4 +44,11 @@
     /// </summary>
     [Parameter]
     public Appearance? Appearance { get; set; }
+
+    private string? GetAriaLabelWithRequired()
+    {
+        var label = AriaLabel ?? Label ?? Title ?? string.Empty;
+
+        return label + (Required ? $", {RequiredAriaLabel}" : string.Empty);
+    }
 }