angular/angular-cli ? reverse-engineered prompt

Build me an Angular command line tool that helps people start new apps, run them locally, and keep them updated. I want the basic experience to feel like the real Angular CLI, so someone can create a new workspace, generate common app pieces, serve the app in development, build it for production, and run tests from the terminal.

Make it polished enough that a developer could install it and use commands like creating a project, adding components or other simple scaffolding, and getting clear help text when they are not sure what to do. Include sensible defaults, friendly error messages, and a straightforward structure that would make it easy to grow later.

If you need to check current Angular docs or best practices online, feel free to do that. Focus on making the tool actually usable end to end, not just a demo.