Added PowerPoint templates to the Slide Assistant (#1055)

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

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

@@ -0,0 +1,15 @@
+namespace AIStudio.Tools.PowerPoint;
+
+/// <summary>
+/// A shape of a template slide which repeats a slot of its layout, e.g., a second heading with its
+/// text, which the author copied from the placeholders of the slide.
+/// </summary>
+/// <remarks>
+/// PowerPoint turns a copied placeholder into a text box which keeps the look of the placeholder,
+/// but no longer belongs to the layout. The slide still means it as one more slot of the same kind,
+/// so the model fills or removes it like any slot, just as a table pasted onto a slide counts as the
+/// table of the slide.
+/// </remarks>
+/// <param name="Slot">The slot the copy offers: the role of the slot it repeats, the next number of that role, and the place and capacity of the copy.</param>
+/// <param name="ShapeId">The ID of the shape on the slide, which finds the copy again when the presentation is written.</param>
+internal sealed record TemplateSlotCopy(TemplateSlot Slot, uint ShapeId);