Added updateOnly option to createShortcut command

[SamvelRaja]

The createShorcutForExecutable method has the ability to do differentiation between whether it is a updateOnly action or a create Action but this ability is not exposed via command line.

This PR enables the feature, feel free to decline it if it is not aligning with the roadmap.

[SamvelRaja]

@kutu Changes looks fine?

[kutu]

@SamvelRaja yes, i have tested it, and it works as expected, thx

[SamvelRaja]

@kutu will it be merged? A lot of electron apps would be in need of this feature.

[kutu]

How do I know, I'm nobody in this project But I use this in my project now, thanks for PR