Added configuration for preview feature visibility (#222)

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

@@ -27,6 +27,11 @@ public sealed class DataApp
     /// The navigation behavior.
     /// </summary>
     public NavBehavior NavigationBehavior { get; set; } = NavBehavior.NEVER_EXPAND_USE_TOOLTIPS;
+
+    /// <summary>
+    /// The visibility setting for previews features.
+    /// </summary>
+    public PreviewVisibility PreviewVisibility { get; set; } = PreviewVisibility.NONE;
     
     /// <summary>
     /// Should we preselect a provider for the entire app?

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

@@ -0,0 +1,11 @@
+namespace AIStudio.Settings.DataModel;
+
+public enum PreviewVisibility
+{
+    NONE = 0,
+    
+    RELEASE_CANDIDATE,
+    BETA,
+    ALPHA,
+    PROTOTYPE,
+}