Added material to the BeyondFacts Lab (#1180)

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

@@ -0,0 +1,8 @@
+namespace AIStudio.Assistants.BeyondFactsLab;
+
+/// <summary>
+/// The file the lab reads for a preparation right now, to show the person what is going on.
+/// </summary>
+/// <param name="Name">The name of the file as the person knows it.</param>
+/// <param name="Kind">What the file becomes: a recording takes long, since it is transcribed first.</param>
+public sealed record BflMaterialInProgress(string Name, BflMaterialKind Kind);