dir-to-uss does not provide an option for verbose output

[markcocker]

When automating use of the command upload dir-to-uss it would be useful to have an option to output a message for each file transferred for auditing and problem diagnosis.

For example the user forgets to add node_modules - to the .zosattributes file to exclude uploading Node.js dependencies, starts to upload the directory with the --recursive option and wonders why it takes such a long time. If they could re-run the command and get verbose output they would see the list of files that were transferred and realise their mistake, rather than just the system was slow.