docs(ivy): document global debugging utilities and clean up API (#34453)

Cleans up the public API of the global debugging utilities, documents them and exposes them in the API docs.

PR Close #34453

packages/core/global/index.ts

@@ -0,0 +1,11 @@
+/**
+ * @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
+ */
+
+// The global utilities are re-exported through here so that they get their own separate `global`
+// section in the API docs which makes it more visible that they can't be imported directly.
+export * from '../src/render3/global_utils_api';