extend the list databases request (#951)

* extend the list databases request

* reuse databaseInfo and refactor

* fix typo

src/Microsoft.SqlTools.ServiceLayer/Connection/Contracts/ListDatabasesParams.cs

@@ -14,5 +14,10 @@ namespace Microsoft.SqlTools.ServiceLayer.Connection.Contracts
         /// URI of the owner of the connection requesting the list of databases.
         /// </summary>
         public string OwnerUri { get; set; }
+
+        /// <summary>
+        /// whether to include the details of the databases.
+        /// </summary>
+        public bool? IncludeDetails { get; set; }
     }
 }