CLI utility to generate flow config files

### Description of feature

It might be helpful to have a CLI utility that helps developers generate flow config files. There are probably a few different ways to accomplish this and may be worth a discussion. Apologies if something accomplishing the same already exists and I missed it.

### Motivation (optional)

_No response_

### Expected behavior (optional)

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### Additional Information (optional)

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The issue names no files, tests, or entry points. Start by reviewing the existing flow configuration format and CLI structure, then clarify which configuration types and generation options are supported; done means a defined utility with documented behavior and coverage for its supported cases.

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