Support all NextCloud-supported contact attributes.

[RokeJulianLockhart]

Checklist

• [X] I made sure that there are no existing issues - open or closed - to which I could contribute my information.
• [X] I made sure that there are no existing discussions - open or closed - to which I could contribute my information.
• [X] I have read the FAQs inside the app (Menu -> About -> FAQs) and my problem isn't listed.
• [X] I have taken the time to fill in all the required details. I understand that the bug report will be dismissed otherwise.
• [X] This issue contains only one feature request.
• [X] I have read and understood the contribution guidelines.
• [ ] I optionally donated to support the Fossify mission.

Feature description

NextCloud exposes

to the user.

Why do you want this feature?

Because there is no mobile contact manager advanced enough to support these attributes, even though most are RFC-standard.

Additional information

https://help.nextcloud.com/t/what-attributes-does-nextcloud-contacts-support/182314/1?u=rokejulianlockhart

[link-leo]

Additionally, the Contacts app doesn't seem to sync the Nextcloud groups. Would like to see this included. As well as the ability to flag Favorites in Nextcloud that sync to the app.

[AKDub]

Additionally, the Contacts app doesn't seem to sync the Nextcloud groups. Would like to see this included. As well as the ability to flag Favorites in Nextcloud that sync to the app.

Hmmm, mine seem to sync fine. I have the 'Contact group method' set to 'Groups are per-contact categrories' in DAVx5 if that makes a difference?

[RokeJulianLockhart]

Hmmm, mine seem to sync fine.

@AKDub, please provide a screenshot of "Time zone", "Spoken languages", or "Federated cloud ID" rendering in Fossify Contacts.

I have the 'Contact group method' set to 'Groups are per-contact categrories' in DAVx5 if that makes a difference?

That's the sole method supported by NC via DAVx5, so it shouldn't matter - I certainly used the same.