Added a retrieval context validation agent (#289)

app/MindWork AI Studio/Tools/IConfidence.cs

@@ -0,0 +1,16 @@
+namespace AIStudio.Tools;
+
+/// <summary>
+/// A contract for data classes with a confidence value.
+/// </summary>
+/// <remarks>
+/// Using this confidence contract allows us to provide
+/// algorithms based on confidence values.
+/// </remarks>
+public interface IConfidence
+{
+    /// <summary>
+    /// How confident is the AI in this task or decision?
+    /// </summary>
+    public float Confidence { get; init; }
+}