The Ionic CLI should be your go to tool for building and maintaining Ionic applications.
It should provide:
A standardised project structure; code scaffolding; aliases; environment specific configuration; themes; logging; unit and e2e testing; and baked in best practices that have been discovered by the community over time.
One of the major projects that the Angular team delivered in the last few months is Schematics.
To quote Schematics README.md:
Schematics are generators that transform an existing file system. It can create files, refactor existing files, or move files around.