Create a REST handler and any other necessary associated code (extension.json entry, helper classes, etc.) for the POST lists/setup endpoint.

• endpoint implemented
• tests created
• tests pass

Endpoint summary:
Opt in to use reading lists

Endpoint description:
Must precede other list operations.
Request must be authenticated with a MediaWiki session cookie.
Stability: unstable

Associated RESTBase code
lists.yaml (spec+forwarding)
lists.js (tests)

Associated Action API code
ApiReadingListsSetup
ApiReadingListsSetupAndTeardownTest

Parameters:

Error Response

#/components/schemas/problem per API.md and draft-nottingham-http-problem

Success Response

json object