feat(schedules): add timezone support for scheduled jobs and update database schema

- Introduced a new `commonTimezones` array for timezone selection in the UI.
- Updated the schedule form to include an optional timezone field.
- Modified the database schema to add a `timezone` column to the `schedule` table.
- Enhanced the scheduling logic to utilize the specified timezone, defaulting to UTC if not provided.

apps/schedules/src/queue.ts

@@ -40,6 +40,7 @@ export const scheduleJob = (job: QueueJob) => {
 		jobQueue.add(job.scheduleId, job, {
 			repeat: {
 				pattern: job.cronSchedule,
+				tz: job.timezone || "UTC",
 			},
 		});
 	} else if (job.type === "volume-backup") {