Added request to list databases on the server for the current connection

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

@@ -0,0 +1,18 @@
+//
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+//
+
+namespace Microsoft.SqlTools.ServiceLayer.Connection.Contracts
+{
+    /// <summary>
+    /// Parameters for the List Databases Request.
+    /// </summary>
+    public class ListDatabasesParams
+    {
+        /// <summary>
+        /// URI of the owner of the connection requesting the list of databases.
+        /// </summary>
+        public string OwnerUri;
+    }
+}