Added the Model Comparison assistant for blind comparisons of two models (#1009)

Co-authored-by: Thorsten Sommer <SommerEngineering@users.noreply.github.com>

app/MindWork AI Studio/Components/ProviderSelectionWithConfidence.razor.cs

@@ -0,0 +1,32 @@
+using Microsoft.AspNetCore.Components;
+
+namespace AIStudio.Components;
+
+/// <summary>
+/// A provider selection with the confidence of the selected provider next to it, for a page which lets the user choose
+/// several providers: the confidence card in the footer of an assistant knows only one of them.
+/// </summary>
+/// <remarks>
+/// The confidence shows only when the user wants to see it, see DataConfidence.ShowProviderConfidence. Like
+/// ProviderSelection, this takes the component from the cascading parameter of its page.
+/// </remarks>
+public partial class ProviderSelectionWithConfidence : MSGComponentBase
+{
+    /// <summary>
+    /// Gets or sets the selected provider.
+    /// </summary>
+    [Parameter]
+    public AIStudio.Settings.Provider ProviderSettings { get; set; } = AIStudio.Settings.Provider.NONE;
+
+    /// <summary>
+    /// Gets or sets what happens when the user selects another provider.
+    /// </summary>
+    [Parameter]
+    public EventCallback<AIStudio.Settings.Provider> ProviderSettingsChanged { get; set; }
+
+    /// <summary>
+    /// Gets or sets the validation of the selected provider, which returns an issue or null.
+    /// </summary>
+    [Parameter]
+    public Func<AIStudio.Settings.Provider, string?> ValidateProvider { get; set; } = _ => null;
+}