Summary

Add --address flag to gog contacts create and gog contacts update commands, allowing users to set street addresses on contacts.

Changes

• Add addresses to contactsReadMask for API requests
• Add Address field to ContactsCreateCmd and ContactsUpdateCmd
• Add primaryAddress() helper to extract formatted address
• Display address in gog contacts get output

Usage

# Create contact with address
gog contacts create --given John --family Doe --address "123 Main St, London"

# Update existing contact's address
gog contacts update people/c123456 --address "456 New St, Manchester"

# Clear address
gog contacts update people/c123456 --address ""

# View contact (now shows address)
gog contacts get people/c123456

Testing

• make test passes
• make fmt applied
• Manually tested create/update/get with real Google Contacts

Notes

The --address flag sets the StreetAddress field. Google automatically generates the FormattedValue from this. For display, we prefer FormattedValue if available, falling back to StreetAddress.

This follows the existing pattern for phone/email handling in the codebase.