Create script to check accrued vacation

[patcon]

This is something we could probably pretty easily get out of the HR system. Any privacy issue could be resolved by only allowing you to get details for yourself. If you want to be private, just don't use the command and ask Kim directly.

Context: https://mp.slack.com/archives/wonderbra-general/p1384811163000100

cc: @anandpathaksharma