Read an Item from a Wishlist

[Wstz0231]

As a customer I need to view the details of a specific item in my wishlist So that I can review the product information

Details and Assumptions

• Create a REST API to fetch the details of a specific item from a wishlist
• The client will provide both the wishlist ID and the item ID to fetch the specific item
• Query the database to retrieve the item details for the provided IDs

• If the item or wishlist ID does not exist, the system should return an error message

  Acceptance Criteria

  Given a customer has a specific wishlist with items
  When they send a GET request to "/wishlists/{id}/items/{id}"
  Then the service should return the details of the specified item.

[HelenZhou2400]

Same PR #34 with delete an item