**What**
Allow a customer to complete a requested order edit.
**Test**
- Unit tests complete flow
- Unit tests medusa react
- Integration tests of order edit completion
FIXES CORE-501
**What**
- Implements the admin/store retrieval end point
- Service implementation of the retrieve method
- Service implementation of the computeLineItems method which aggregates the right line item based on the changes that are made
- client
- medusa-js api
- medusa-react queries hooks
**Tests**
- Unit tests of the retrieval end points
- Unit tests of the service retrieve method and computeLineItems
- Integration tests for admin/store
- client
- medusa-js tests
- medusa-react hooks tests
FIXES CORE-492
