Creates and initializes a new Angular app that is the default project for a new workspace.

Provides interactive prompts for optional configuration, such as adding routing support.
All prompts can safely be allowed to default.

* The new workspace folder is given the specified project name, and contains configuration files at the top level. 

* The new app files are placed in the `src/` subfolder. A corresponding end-to-end test app is placed in the `e2e/` subfolder.

* The new app's configuration appears in the `projects` section of the `angular.json` workspace configuration file, under its project name.