[#58345] Primerize Relations tab

[aaron-contreras]

Ticket

https://community.openproject.org/work_packages/58345

What are you trying to accomplish?

Primerize the Relations tab according to Figma mockups

Note: This is an implementation chunk of https://community.openproject.org/projects/stream-planning-and-reporting/work_packages/22360

What approach did you choose and why?

Followed the patterns established when primerizing the Activity tab and the Meetings tab

Merge checklist

• [ ] Added/updated tests
• [ ] Added/updated documentation in Lookbook (patterns, previews, etc)
• [ ] Tested major browsers (Chrome, Firefox, Edge, ...)