feat(build): record angular version in the dom (#13164)

modules/@angular/core/src/version.ts

@@ -0,0 +1,22 @@
+/**
+ * @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
+ */
+
+/**
+ * @whatItDoes Represents the version of Angular
+ *
+ * @stable
+ */
+export class Version {
+  constructor(public full: string) {}
+
+  get major(): string { return this.full.split('.')[0]; }
+
+  get minor(): string { return this.full.split('.')[1]; }
+
+  get patch(): string { return this.full.split('.')[2]; }
+}