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/ModelComparisonModelChoice.cs

@@ -0,0 +1,17 @@
+namespace AIStudio.Assistants.ModelComparison;
+
+/// <summary>
+/// Which model a column-based choice -- a vote or a judge verdict -- actually means, once translated
+/// out of the run's own presentation order.
+/// </summary>
+/// <remarks>
+/// First/Second names the models the way the user picked them, the one thing that stays comparable
+/// across every run of a batch: the column a model stood in is drawn fresh for every run, so a tally
+/// kept in column terms would count nothing meaningful.
+/// </remarks>
+public enum ModelComparisonModelChoice
+{
+    FIRST,
+    SECOND,
+    TIE,
+}