Multiple/individualized share links for a calendar

[l-mb]

As a user, I want to share my calendar with multiple other people (who might not be on my own NextCloud instance).

Currently, "Share Link" only allows for one link per calendar. That does not give me the ability to revoke or control access on an individual level, only for the entire calendar and everyone else.

I'd expect the ability to have multiple (named) share links with individual permissions so I can manage several other collaborators individually.

(I did find #1440 but was unsure whether that's the same thing.)

[szaimen]

ref #20214