Develop the Create & Update Set Modal

[stynan27]

Description

Create a react widget for updating the values of an individual Lego set.

• [x] unblock by completing #23 #24

subtask of #9

[stynan27]

Note: @stynan27 updated /register and /login to both return the user.id for use in the Lego Set Management page API.

//

• [ ] Store this Id on login AND register GLOBALLY
• [ ] Used in set API like "localhost:8080/api/user/{user.id}/lego-set/{legSet.id}"