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/Assistants/ModelComparison/ModelComparisonPreset.cs

@@ -0,0 +1,52 @@
+namespace AIStudio.Assistants.ModelComparison;
+
+/// <summary>
+/// A saved set of the inputs of the Model Comparison assistant, so that a familiar test case does not have to be typed
+/// and picked by hand again every time.
+/// </summary>
+/// <remarks>
+/// Each preset is a file of its own below the data directory, see ModelComparisonStore, not a part of the settings: a
+/// preset can carry a long document as its context, and the settings are written anew whenever any setting changes.
+/// Presets belong to the user alone; no configuration plugin rolls them out.
+/// </remarks>
+public sealed record ModelComparisonPreset
+{
+    /// <summary>
+    /// The ID of the preset, which names its file.
+    /// </summary>
+    public Guid Id { get; set; }
+
+    /// <summary>
+    /// The name shown in the preset picker.
+    /// </summary>
+    public string Name { get; set; } = string.Empty;
+
+    /// <summary>
+    /// The ID of the provider of the first model, or empty when none was selected while saving. Resolved back to a
+    /// provider through SettingsManager.GetProviderById, which answers Provider.NONE for an ID that no longer exists.
+    /// </summary>
+    public string FirstProviderId { get; set; } = string.Empty;
+
+    /// <summary>
+    /// The ID of the provider of the second model, see FirstProviderId.
+    /// </summary>
+    public string SecondProviderId { get; set; } = string.Empty;
+
+    public bool JudgeEnabled { get; set; }
+
+    /// <summary>
+    /// The ID of the provider of the judge, see FirstProviderId.
+    /// </summary>
+    public string JudgeProviderId { get; set; } = string.Empty;
+
+    /// <summary>
+    /// The expectations, values, and goals of the user, by which the judge decides, see ModelComparisonJudgeExpectations.
+    /// </summary>
+    public string JudgeInstructions { get; set; } = string.Empty;
+
+    public string Context { get; set; } = string.Empty;
+
+    public string Question { get; set; } = string.Empty;
+
+    public int RunCount { get; set; } = 1;
+}