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/Tools/DataBackup/DataBackupEntryKind.cs

@@ -46,6 +46,11 @@ public enum DataBackupEntryKind
     /// </summary>
     BEYOND_FACTS_LAB,
 
+    /// <summary>
+    /// The presets, the results, and the comparison series with their chats of the Model Comparison assistant.
+    /// </summary>
+    MODEL_COMPARISONS,
+
     /// <summary>
     /// The SQLite index of the data sources: which files are embedded, and their text chunks.
     /// </summary>