[Feature request] Additional staff schedule options

[massey21]

Suggestion/request 1: Work from home
It would be helpful to be able to indicate that a staff member is working from home on a given day. That is, they should be responsive electronically but aren't physically present in the lab. Many of our people work remotely on Mondays, Fridays, or both.

Suggestion/request 2: Recurring absences
Some of our staff work alternate work schedules (e.g., 80 hours over 9 days, or 40 hours over 4 days) and thus have recurring absences. If some "make recurring every n weeks" option is feasible for absences, it would be nice.

[rptmat57]

This seems like a good idea, we would accept PRs if anyone is interested in contributing.