Add agent-trace-eval-scheduler as a new OS plugin (#263)

Signed-off-by: Peter Zhu <zhujiaxi@amazon.com>

Author: peterzhuamazon

.gitignore

@@ -24,4 +24,5 @@
 /geospatial/
 /opensearch-oci-object-storage/
 /search-relevance/
-.DS_Store
+/agent-trace-eval-scheduler/
+.DS_Store

plugins/.gitignore

@@ -28,3 +28,4 @@
 /opensearch-prometheus-exporter/
 /user-behavior-insights/
 /search-relevance/
+/agent-trace-eval-scheduler/

plugins/.meta

@@ -29,6 +29,7 @@
     "search-relevance": "git@github.com:opensearch-project/search-relevance.git",
     "dashboards-investigation": "git@github.com:opensearch-project/dashboards-investigation.git",
     "opensearch-prometheus-exporter": "git@github.com:opensearch-project/opensearch-prometheus-exporter",
-    "user-behavior-insights": "git@github.com:opensearch-project/user-behavior-insights.git"
+    "user-behavior-insights": "git@github.com:opensearch-project/user-behavior-insights.git",
+    "agent-trace-eval-scheduler": git@github.com:opensearch-project/agent-trace-eval-scheduler.git
   }
-}
+}