Show all contact information in the details view #3847

Initial Checklist

• I understand this is a user story and questions should be posted in the Community Discussions
• I searched issues and couldn’t find anything (or linked relevant results below)

Part of #3844

User Story

As a contacts user, I want to see all information stored for a contact so that nothing synced from other clients is hidden.

User Value

Contacts synced via CardDAV or imported from other systems often contain labelled entries, online services and photos. The details view currently drops labels and doesn't show some properties at all.

Acceptance Criteria

• Emails, phone numbers and addresses show their label (private / work / mobile / other)
• Online services (e.g. website, messenger) are shown
• The contact photo is shown in the header instead of the initials avatar, if available
• Multiple organizations / titles are shown
• Postal addresses are formatted in a readable way
• Unit tests cover the new sections