Allow programatic reuse of import functionality

[theunrepentantgeek]

Expose the import azure-resource functionality from asoctl as a public library so that it can be reused.

Currently the functionality is in internal packages and can't be reused.

• Need to refactor to remove dependencies on console tools such as the multiple-progress-bar.

[ashetonh-ad]

this would help us immensely as we want to wrap the import process programmatically to allow for custom validation and formatting for our kube manifests and where they live.

Currently we are running an exec process with the binary installed to do so.

[matthchr]

We're still interested in this.