Reminder to change co-authors

[rkotze]

Summary

You might rotate pairs or mob in your team and forget to update Git Mob list. Trigger an alert when a certain amount of time has passed to prompt a change.

Provide a configuration option to specify the amount of time to wait before the alert is triggered.

Another option is to also run the solo command to reset the git mob to just the author after a certain amount has passed.

Motivation

Prevent accidental commits with the wrong pair attributed