[Fix] Wire select option drag handles

[nilzzzzzz]

Reference: n/a

Description

Follow-up to #14: the select option rows already showed drag handles, but the handles were only visual. This wires them to actual sorting.

Solution

• Wrap select options in dnd-kit sortable context.
• Attach sortable listeners to the existing drag handle.
• Keep the visible UI unchanged: handle, input, delete.
• Add a regression test for drag-end reordering.

Preview (screenshots/screencasts)

n/a

How has this been tested?

• Unit Tests / Storybook / E2E / Manually
• npm run test -- FieldConfigDialog
• npm run lint
• npm run build

awork Runner config

default