Cron 表达式解析器

支持标准 5 段 Cron 的 *、列表、范围和步长，例如 */15 9-18 * * 1-5。结果按浏览器本地时区计算；不把 Quartz 6/7 段语法冒充成已支持。

1. 1
   10/12/2026, 9:00:00 AM

   2026-10-12T09:00:00.000Z
2. 2
   10/13/2026, 9:00:00 AM

   2026-10-13T09:00:00.000Z
3. 3
   10/14/2026, 9:00:00 AM

   2026-10-14T09:00:00.000Z
4. 4
   10/15/2026, 9:00:00 AM

   2026-10-15T09:00:00.000Z
5. 5
   10/16/2026, 9:00:00 AM

   2026-10-16T09:00:00.000Z
6. 6
   10/19/2026, 9:00:00 AM

   2026-10-19T09:00:00.000Z
7. 7
   10/20/2026, 9:00:00 AM

   2026-10-20T09:00:00.000Z
8. 8
   10/21/2026, 9:00:00 AM

   2026-10-21T09:00:00.000Z
9. 9
   10/22/2026, 9:00:00 AM

   2026-10-22T09:00:00.000Z
10. 10
    10/23/2026, 9:00:00 AM

    2026-10-23T09:00:00.000Z