Add waiting for next period

emgauwa-lib/src/models/relay.rs

@@ -79,4 +79,8 @@ impl Relay {
 	pub fn is_on(&self, now: &NaiveTime) -> bool {
 		self.active_schedule.is_on(now)
 	}
+
+	pub fn get_next_time(&self, now: &NaiveTime) -> Option<NaiveTime> {
+		self.active_schedule.get_next_time(now)
+	}
 }