feature(cli): adds --no-config option

[sverweij]

Description

• Adds a --no-config option

Motivation and Context

In the future we want dependency-cruiser to pick up configuration files without having to specify one. That future feature will be a breaking change a.o. because it would be harder to run without a configuration file if there's one available. This option ensures that that behavior remains available, because, altough dependency-cruiser is most useful when used with a configuration file, it can be used without one and we can't be certain that it isn't used without one.

How Has This Been Tested?

• green ci

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• Documentation only change
• Refactor (non-breaking change which fixes an issue without changing functionality)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• 📖

  • My change doesn't require a documentation update, or ...
  • it does and I have updated it

• ⚖️

  • The contribution will be subject to The MIT license, and I'm OK with that.
  • The contribution is my own original work.
  • I am ok with the stuff in CONTRIBUTING.md.