feat(cli): Add non-interactive CLI commands

[dlhck]

Description

The current CLI implementation is interactive, which makes it only usable for humans on the command line. That of course makes automation practically impossible.

This PR introduces non-interactive commands for the existing add commands in the CLI. The motivation behind that is to enable non-interactive script mechanisms that could potentially be used in monorepos.

Furthermore, we expose the generator APIs to that they can also be used from the outside.

Breaking changes

None

Checklist

📌 Always:

• [ ] I have set a clear title
• [ ] My PR is small and contains a single feature
• [ ] I have checked my own PR

👍 Most of the time:

• [ ] I have added or updated test cases
• [ ] I have updated the README if needed