Added better logging for logon steps

[ader1990]

Added logging for custom scripts exit codes and refactored the logon steps which did not have proper methods.

A custom hook script can have special exit codes:

• 0 - The Logon script will continue running
• 1004 - The Logon script will exit after hook execution
• 1005 - The Logon script will perform a reboot
• 1006 - The Logong script will perform a shutdown
• Other exit code, the Logon script will throw an error and stop