Added a retrieval context validation agent (#289)

app/MindWork AI Studio/Tools/TargetWindowStrategy.cs

@@ -0,0 +1,19 @@
+namespace AIStudio.Tools;
+
+public enum TargetWindowStrategy
+{
+    /// <summary>
+    /// Means no target window strategy, which will effectively return all items.
+    /// </summary>
+    NONE,
+    
+    /// <summary>
+    /// Searches for two up-to-three items but at least one.
+    /// </summary>
+    A_FEW_GOOD_ONES,
+    
+    /// <summary>
+    /// Searches for the top 10% items that are better than guessing, i.e., with confidence greater than 0.5f.
+    /// </summary>
+    TOP10_BETTER_THAN_GUESSING,
+}