Add separate Evaluation area

Author: gewarren

.github/policies/mention-owners.yml

@@ -413,7 +413,16 @@ configuration:
               - mentionUsers:
                   mentionees:
                     - dotnet/dotnet-extensions-ai
-                    - shyamnamboodiripad
+                  replyTemplate: >-
+                    Tagging subscribers to this area: ${mentionees}
+                  assignMentionees: False
+          - if:
+              - labelAdded:
+                  label: area-Extensions-AI-Evaluation
+            then:
+              - mentionUsers:
+                  mentionees:
+                    - dotnet/dotnet-extensions-ai-evaluation
                   replyTemplate: >-
                     Tagging subscribers to this area: ${mentionees}
                   assignMentionees: False