cmd/run: --workdir command-line argument

[DaliborKr]

No description provided.

[softwarefactory-project-zuul]

Build succeeded.
https://softwarefactory-project.io/zuul/t/local/buildset/ac0c4ab316eb4507999aed57329b7a2f

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✔️ system-test-fedora-41-runtime-environment-ubuntu SUCCESS in 17m 19s

[debarshiray]

This is looking good!

I think you have exposed a change in Podman's behaviour: https://github.com/containers/podman/issues/26600

We need to add a test for the new option, and update the toolbox-run(1) manual with the new option at doc/toolbox-run.1.md.