@ganoo7 You don't have such native action. You can either use a script to add a button and open a new Suitelet window that generates the file. Or, you can create a custom WF action that will do that and attach it to the button.

@igorp how do i attach it to the button using workflow action

You will need to build a custom WF action, meaning, a scriptable action

i tried to do workflow action script but the thing is that am not able to attach it to the button is there any method that does it, i have used resolveurl method to get suitlet url but no idea how to get it open when button is pushed.

In the workflow, when you add this custom action, set it's transition to be the button click.

how do i do that, i mean how do i set the transition to button click , is there any option