Allow to add multiple phone numbers to the profile

[schiessle]

With this feature implemented #19575 (thanks a lot @miaulalala 🚀 )

I think we should make the profile page more flexible. Especially in a enterprise environment people usually have multiple phone numbers (mobile, landline,...). At the moment the system address book can contain only one phone number. Ideally the system address book would be as flexible with regard to type and number of entries like a regular address book. But as a first staring point allowing multiple phone numbers in the user profile would be already a great enhancement.

[Extarys]

How does the triage works for the nextcloud project ? Like, how long an issue stays in triage before going to "to develop" ?

[miaulalala]

https://datatracker.ietf.org/doc/html/rfc6350#section-6.4.1 says TEL can be used as many times as we want, so 👍 from me.