Added PowerPoint templates to the Slide Assistant (#1055)

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

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

@@ -0,0 +1,22 @@
+namespace AIStudio.Tools.PowerPoint;
+
+/// <summary>
+/// What the presentation does with one slide of the template, as the user chose it.
+/// </summary>
+public enum TemplateSlideUse
+{
+    /// <summary>
+    /// The presentation leaves the slide out, as it does with the samples and hints of a template.
+    /// </summary>
+    OMIT = 0,
+
+    /// <summary>
+    /// The presentation keeps the slide as it is, only in its color variant and with its footer.
+    /// </summary>
+    KEEP,
+
+    /// <summary>
+    /// The model writes new content into the slots of the slide, which keeps its design and every slot the model leaves empty.
+    /// </summary>
+    EDIT,
+}