Add the skeleton for abstracting error classes

Reviewed By: rafeca

Differential Revision: D7180927

fbshipit-source-id: 9acc77e761433845009367faea28b1c8dbbcc114

packages/metro-core/src/errors/index.js

@@ -0,0 +1,13 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @flow
+ * @format
+ */
+
+'use strict';
+
+module.exports = {};