Add Approve / Reject re-assignment page - FE

Update: I proposed adjustments to this design in !157729 (comment 1982935247). Please review first the outcome on discussion on that other MR.

Designs:

Screenshot_2024-07-09_at_10.41.38_AM

Screenshot_2024-07-09_at_10.41.30_AM

Edited by Magdalena Frankiewicz