The pinned messages modal for the thread should display when the user clicks on the banner indicating the number of pinned messages for that given thread. Each message should display the inline engagement (reactions and replies), based on the designs. This is different from the message being displayed in the toggle pin modal, as the designs there indicated that we wanted to remove the inline engagement.
Depends on D7310
There is a follow-up task to help refactor usability for the messages search screen here: https://linear.app/comm/issue/ENG-3644/refactor-file-names-details-to-make-the-thread-pin-modal-reusable-by