[Bug]: `container image push` should output imageref to stdout on success.

[jglogan]

I have done the following

• I have searched the existing issues
• If possible, I've reproduced the issue using the 'main' branch of this project

Steps to reproduce

Tag an image for a repository (for example, docker.io/max-mustermann/scratch/test:latest) and run:

container image push docker.io/max-mustermann/scratch/test:latest 2> /dev/null

Problem description

Expected: On success, the command writes the reference docker.io/max-mustermann/scratch/test:latest to the standard output.

We should discuss here whether to echo back the supplied reference, or print the fully qualified reference.

Actual: The command produces no standard output.

Environment

- OS: 26
- Xcode: 26
- Container: main

Code of Conduct

• I agree to follow this project's Code of Conduct