Add Support For Primary Phone Field

[patbakdev]

Is your feature request related to a problem? Please describe.
When adding a new contact on iOS by selecting an existing number (recents) and choosing New Contact the contact's phone number is created with the Primary field (as discovered using Outlook/CalDav Syncronizer). However, this field is not shown or available when using the Nextcloud Web Client.

Describe the solution you'd like
A the Primary Phone field as an option in the Nextcloud Web Client

[nextcloud-bot]

GitMate.io thinks possibly related issues are #185 (Add possibility to creat custom fields), #187 (Add tel: links for phone numbers), #779 (Additional phone number field not found), #569 (Add end to end encryption support), and #803 (two address fields are connected after adding a phone number).

[skjnldsv]

Duplicate of #202