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

app/MindWork AI Studio/Assistants/VisualBriefing/VisualBriefingRequiredSlot.cs

@@ -0,0 +1,9 @@
+namespace AIStudio.Assistants.VisualBriefing;
+
+/// <summary>
+/// A slot which the content stage asks its model to fill, with what the slot is for.
+/// </summary>
+/// <param name="SlotId">The ID of the slot.</param>
+/// <param name="Role">The semantic role of the slot.</param>
+/// <param name="Type">The type of content the slot takes.</param>
+internal sealed record VisualBriefingRequiredSlot(string SlotId, VisualBriefingSlotRole Role, VisualBriefingSlotType Type);