Send public links automatically through email #3921

Right now, public links need to be manually copied and sent out of band. This creates unnecessary work, especially because opencloud already uses email and should be able to automatically send public links to users.

The new guest links feature is interesting, however it forces expiry and PINs and other restrictions, so it is not the same as sending a public link.

The ability to send public links automatically just by typing an email would be very useful.