sched_job implementation

[j91321]

I think Task scheduler interaction for sched_job can be implemented using PS_ScheduledTask from Root\Microsoft\Windows\TaskScheduler

example: https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1053.005/T1053.005.md#atomic-test-6---wmi-invoke-cimmethod-scheduled-task