Added custom padding for help template

[irapandey]

While working with cobra on a project - I found that the need to add custom padding
This PR would enable user to add a custom value for padding for helper text.

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[marckhouzam]

Thanks @irapandey . Can you please explain when you imagine such a feature being used? I don't want to complicate the API without understanding what value it adds. Thanks.

[irapandey]

Hey @marckhouzam

I understand your concern - I was working on a project that used helper template.

I ran into the need of custom padding when I couldn't adjust the spacing between application and Deploy.

This looks way too small for a detail. If I would have to change the spacing, I would have to write the custom template which is just more work on the user end.

Having the option to add customization will be really helpful to the user.

This way the user can make use of the existing template with their formatting. I can propose more formatting options that can be added.