Added PowerPoint templates to the Slide Assistant (#1055)

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

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

@@ -0,0 +1,8 @@
+namespace AIStudio.Tools.PowerPoint;
+
+/// <summary>
+/// One paragraph of a text slot: a bullet point, or a sub-point of one.
+/// </summary>
+/// <param name="Text">The text, without a bullet character; the template draws the bullets.</param>
+/// <param name="Level">The list level, 0 for a top-level point.</param>
+internal readonly record struct SlideParagraph(string Text, int Level);