feat(properties): add default timezone and currency fields [comhub3-609]

[aperron-coveo]

Description

Add defaultCurrency and defaultTimeZone fields to property model.

Acceptance Criteria

• My changes are publicly available, documented, and deployed in production. (i.e. on Swagger)
• JSDoc annotates each property added in the exported interfaces
• The proposed changes are covered by unit tests
• Commits containing breaking changes a properly identified as such
• README.md is adjusted to reflect the proposed changes (if relevant)
• My merge commit message will follow the commit guidelines (See Commit Guidelines)