Added PowerPoint templates to the Slide Assistant (#1055)

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

app/MindWork AI Studio/Tools/PowerPoint/PresentationFileResult.cs

@@ -0,0 +1,14 @@
+namespace AIStudio.Tools.PowerPoint;
+
+/// <summary>
+/// What became of creating a presentation file.
+/// </summary>
+/// <param name="IsWritten">Whether the presentation was written. It is not when the template changed since the slides were planned, and they no longer fit it; the target stays untouched then.</param>
+/// <param name="SkippedPictures">The numbers of the pictures which could not be placed: unreadable, or in a format PowerPoint does not show. Their slots stay empty.</param>
+internal sealed record PresentationFileResult(bool IsWritten, IReadOnlyList<int> SkippedPictures)
+{
+    /// <summary>
+    /// The template changed since the slides were planned, and they no longer fit it. Nothing was written.
+    /// </summary>
+    public static readonly PresentationFileResult TEMPLATE_CHANGED = new(false, []);
+}