Added the BeyondFacts Lab as a prototype (#1175)

app/MindWork AI Studio/Assistants/BeyondFactsLab/BflFieldOption.cs

@@ -0,0 +1,7 @@
+namespace AIStudio.Assistants.BeyondFactsLab;
+
+/// <summary>
+/// An option of a field of the BeyondFacts Lab.
+/// </summary>
+/// <param name="Id">The ID of the option, which a form stores. It never changes and is unique across all fields.</param>
+public sealed record BflFieldOption(string Id);