Run a task once every hour and receive an event when it triggers.
``` rust
ScheduleReceiver::new()
.interval(ScheduleInterval::Hours(1))
Run a task once every day at 03:00 UTC and receive an event when it triggers.
``` rust
ScheduleReceiver::new()
.start_time(03, 00, 00)
.interval(ScheduleInterval::Days(1))