Add experimental preview feature option

app/MindWork AI Studio/Settings/ConfigurationSelectData.cs

@@ -85,6 +85,7 @@ public static class ConfigurationSelectDataFactory
         yield return new("Also show features in beta: these are almost ready for release; expect some bugs", PreviewVisibility.BETA);
         yield return new("Also show features in alpha: these are in development; expect bugs and missing features", PreviewVisibility.ALPHA);
         yield return new("Show also prototype features: these are works in progress; expect bugs and missing features", PreviewVisibility.PROTOTYPE);
+        yield return new("Show also experimental features: these are experimental; expect bugs, missing features, many changes", PreviewVisibility.EXPERIMENTAL);
     }
     
     public static IEnumerable<ConfigurationSelectData<NavBehavior>> GetNavBehaviorData()

app/MindWork AI Studio/Settings/DataModel/PreviewVisibility.cs

@@ -8,4 +8,5 @@ public enum PreviewVisibility
     BETA,
     ALPHA,
     PROTOTYPE,
+    EXPERIMENTAL,
 }