Idea: Add Window.PrintToPdf silent PDF export API

[LianSchedule]

I would like to propose adding a PrintToPdf() method on the Window API to export webview content silently to a PDF file, without opening the print dialog.

The options should match Electron's PDFOptions for easier migration from Electron, and it must support fully‑custom page sizes, not just standard paper sizes.

https://www.electronjs.org/docs/latest/api/web-contents#contentsprinttopdfoptions

Would this be a good candidate for a WEP?

[rfberaldo]

Would love this added, only option we have now is use the print dialog which is not good UX, or use a frontend lib which is not desired.