Added a rewrite and text improvement assistant (#73)

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

@@ -38,4 +38,8 @@ public sealed class Data
     public DataTextContentCleaner TextContentCleaner { get; init; } = new();
     
     public DataAgenda Agenda { get; init; } = new();
+    
+    public DataGrammarSpelling GrammarSpelling { get; init; } = new();
+    
+    public DataRewriteImprove RewriteImprove { get; init; } = new();
 }