Generated the JSON contracts of visual briefings and model answers at compile time (#1151)

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

@@ -0,0 +1,10 @@
+using System.Text.Json.Serialization;
+
+namespace AIStudio.Tools.PowerPoint;
+
+/// <summary>
+/// The contracts with which System.Text.Json reads the slides a model plans, built at compile time.
+/// </summary>
+[JsonSourceGenerationOptions(GenerationMode = JsonSourceGenerationMode.Metadata)]
+[JsonSerializable(typeof(SlideDeckSpec.DeckDto))]
+internal sealed partial class SlideDeckJsonContext : JsonSerializerContext;