Added an introduction and an onboarding chat to the BeyondFacts Lab (#1178)

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

@@ -0,0 +1,18 @@
+namespace AIStudio.Assistants.BeyondFactsLab;
+
+/// <summary>
+/// The place of the chat of a step of a preparation.
+/// </summary>
+/// <param name="ProjectId">The ID of the preparation.</param>
+/// <param name="Step">The step.</param>
+public sealed record BflStepThreadLocation(Guid ProjectId, BflStep Step) : BflThreadLocation
+{
+    /// <inheritdoc />
+    public override Guid ChatId => BflThreadId.Of(this.ProjectId, this.Step);
+
+    /// <inheritdoc />
+    public override string Key => $"{this.ProjectId:D}/{this.Step.FolderName}";
+
+    /// <inheritdoc />
+    public override string ChatName => this.Step.FolderName;
+}