It would be good to have a command that can list all the project dependencies in a nice table structure that can be used from the shell.

Today there is no such command.

There is a project-has-dependencies which is rather useless, it requires the user to type in a group + artifact id, to see if its added or not, and you just get a kinda true|false response.

When you work with a project, you often want to be able to add / remove dependencies, and therefore also want to see the current list. And also their scope etc, which are compile | test scoped etc.