Adding PDF Action?

[corynewey]

First off, thank you very much for this library; it's a lifesaver.

I'm trying to create a pdf that will prompt the user to print it when opened. I see in the Adobe documentation that Actions can be added to support this functionality and I see in the pdf-lib documentation for the addJavaScript() function that we can add Javascript that can be used by an Action.

However, I don't see any way to actually add the Action. Is that possible? Alternatively, is there another method to prompt the user to print the pdf when it is opened?