Function cron

repos/effect/packages/effect/src/Schedule.ts:1392–1400

(expression: string | Cron.Cron, tz?: string | DateTime.TimeZone)

 * |----------|----------|----------|----------|
 * |action------|sleep---|act|-sleep|action----|
 * ```
 *
 * **Example** (Repeating on aligned windows)
 *
 * ```ts import.meta.vitest
 * import { Duration, Effect, Schedule } from "effect"
 *
 * const program = Effect.gen(function*() {
 *   const step = yield* Schedule.toStep(Schedule.windowed("5 seconds"))
 *   return yield* step(0, undefined)
 * })
 *