feat(elements): set up the elements package

packages/elements/src/version.ts

@@ -0,0 +1,14 @@
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+
+import {Version} from '@angular/core';
+
+/**
+ * @experimental
+ */
+export const VERSION = new Version('0.0.0-PLACEHOLDER');