feat(task): print actual command in log

[Tyarel8]

When you create a pueue command with task spawn, it always creates something like this nu --config '/path/to/config.nu' --env-config '/path/to/env.nu' /tmp/tmp.A5rnMvNeKm-nu-task.

With this change, doing task log will contain in the command and original_command with the actual contents of the task script, and original_command will be omitted if it's the same as regular command to avoid printing the same twice.

[fdncred]

Thanks