Insert new referrals into the waiting list
wl_insert.Rd
adds new referrals (removal date is set as NA)
Examples
referrals <- c.Date("2024-01-01", "2024-01-04", "2024-01-10", "2024-01-16")
removals <- c.Date("2024-01-08", NA, NA, NA)
waiting_list <- data.frame("referral" = referrals, "removal" = removals)
additions <- c.Date("2024-01-03", "2024-01-05", "2024-01-18")
longer_waiting_list <- wl_insert(waiting_list, additions)