feature: add possibility to copy a job

[mxdev88]

It would be quite handy to be able to copy a job definition. Very often we need to schedule similar job with slightly different parameters. As of now, we create all from scratch. Would you consider adding this feature?

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.