Added the guided chat to the BeyondFacts Lab (#1177)

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

@@ -0,0 +1,27 @@
+namespace AIStudio.Assistants.BeyondFactsLab;
+
+/// <summary>
+/// How much room a chat of the BeyondFacts Lab has left in the context of its model.
+/// </summary>
+public enum BflTokenBudgetState
+{
+    /// <summary>
+    /// Nobody knows: the count failed, or the model has no statement about its context.
+    /// </summary>
+    UNKNOWN,
+
+    /// <summary>
+    /// Room enough.
+    /// </summary>
+    OK,
+
+    /// <summary>
+    /// Most of the context is used; the person should think about starting over.
+    /// </summary>
+    WARNING,
+
+    /// <summary>
+    /// The next message and its answer would not fit anymore, so the lab sends no more.
+    /// </summary>
+    FULL,
+}