WIP for QueryExecution, mostly complete

src/Microsoft.SqlTools.ServiceLayer/QueryExecution/Contracts/QueryExecuteCompleteNotification.cs

@@ -0,0 +1,34 @@
+using Microsoft.SqlTools.ServiceLayer.Hosting.Protocol.Contracts;
+
+namespace Microsoft.SqlTools.ServiceLayer.QueryExecution.Contracts
+{
+    public class QueryExecuteCompleteParams
+    {
+        /// <summary>
+        /// URI for the editor that owns the query
+        /// </summary>
+        public string OwnerUri { get; set; }
+
+        /// <summary>
+        /// Any messages that came back from the server during execution of the query
+        /// </summary>
+        public string[] Messages { get; set; }
+
+        /// <summary>
+        /// Whether or not the query was successful. True indicates errors, false indicates success
+        /// </summary>
+        public bool Error { get; set; }
+
+        /// <summary>
+        /// Summaries of the result sets that were returned with the query
+        /// </summary>
+        public ResultSetSummary[] ResultSetSummaries { get; set; }
+    }
+
+    public class QueryExecuteCompleteEvent
+    {
+        public static readonly 
+            EventType<QueryExecuteCompleteParams> Type =
+            EventType<QueryExecuteCompleteParams>.Create("query/complete");
+    }
+}