Crontab Parsing
Linux Crontab command is a powerful utility that is used for scheduling and automating tasks in Unix-like operating systems.
In this mission your task is to parse a crontab timing expression (crontab format MIN HOUR DOM MON DOW), return a sorted ascending list of next 3 execution datetimes based on a provided current datetime (ISO format YYYY-MM-DDTHH:MM).
Your script must support all standard crontab expressions:
- Single numbers: 5, 10, 15;
- Ranges: 1-5;
- Steps: */2, 1-10/2;
- Lists: 1,3,5;
- Special character: *;
- Special keywords:...
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