Update SchTask.cs

[mohinparamasivam]

1. Added new minutes feature for Schedule Task
2. Added code to evaluate the optional additional parameter "-o" where the number specified after keywords "hourly / minutes or daily" are converted into integer and calculated into interval timings. This enables the operator to perform persistence on a custom interval timing.

Example : SharPersist -t schtask -c "C:\Windows\System32\cmd.exe" -a "/c echo 123 >> c:\123.txt" -n "Some Task" -m add -o "minutes 5"

Note : Example Above will create the schedule task that will execute every 5 minutes. Same example goes for hourly and daily option.

[mohinparamasivam]

@h4wkst3r Pls do review this pull request

[mohinparamasivam]

Commit : 029bfbe

1. Added "Last Runtime" Info for Scheduled Task when listing is performed
2. Updated usage of schtasks command with the -o frequency in the Main Function when -h is used
3. Added additional checks when listing is performed based on frequency (Previously it lists all tasks without following the specified frequency)

[h4wkst3r]

Hi @mohinparamasivam - This is now actively being maintained on my personal fork of SharPersist. Please submit this pull request to https://github.com/h4wkst3r/SharPersist and I can review it. Thank you for submitting!

[mohinparamasivam]

@williballenthin Please update the main branch with these commits as pushed here https://github.com/h4wkst3r/SharPersist . Thanks