DRAFT: Making CLI more testable #8575
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This is a work in progress. There are a series of changes that need to be made to the CLI to make it more testable.
Its possible this PR won't be the final form - its more of an exploration.
The key changes is turning some things like DotNetCliRunner into an interface so we can sub it in test cases, and putting UX interactions behind an interactivity service so we can simulate user input in test cases (and assert of things).
We also need to abstract out some basic file system operations to make testing easier.