Auto show detail when step holding

[waketzheng]

Is your feature/enhancement proposal related to a problem? Please describe.

When executing `pdm add ultralytics` output stays resolving for a long time, it make beginner doubt that whether the process is dead or still running.

By comparison, poetry add ultralytics show the increasing cost time, and pip install ultralytics show the download progressbar, so I know that they are still running.

Describe the solution you'd like

If one step cost too much time without any new output, print more detail to let me know what's it doing now.

Or show a progressbar to tell how long to wait.

[yngvem]

If you want more information on what PDM is doing, then you can add -v to the command (it's relatively common for CLIs to have a -v option, short for verbose).