Improved the dialogs for local data sources and the Batch Processing assistant (#1096)

Co-authored-by: Thorsten Sommer <SommerEngineering@users.noreply.github.com>

app/MindWork AI Studio/Tools/FileExclusionGroups.cs

@@ -0,0 +1,8 @@
+namespace AIStudio.Tools;
+
+/// <summary>
+/// A list of excluded files and folders, split into the entries for folders and those for files.
+/// </summary>
+/// <param name="Folders">The entries which name folders, e.g., bin/, joined into one list.</param>
+/// <param name="Files">The entries which name files, e.g., *.min.js, joined into one list.</param>
+internal readonly record struct FileExclusionGroups(string Folders, string Files);