Create a REST handler and any other necessary associated code (extension.json entry, helper classes, etc.) for the `lists/batch` POST endpoint.
[] endpoint implemented
[] tests created
[] tests pass
**Endpoint summary:**
Create multiple new lists for the current user
**Endpoint description:**
See `POST /lists/`.
Stability: [unstable](https://www.mediawiki.org/wiki/API_versioning#Unstable)
**Associated RESTBase code**
[[ https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/services/restbase/+/d544e9da48b9c79afb2338b7bab6960a94db6c61/v1/lists.yaml#387 | lists.yaml ]]
**Associated Action API code**
[[ https://gerrit.wikimedia.org/r/plugins/gitiles/mediawiki/extensions/ReadingLists/+/refs/heads/master/src/Api/ApiReadingListsCreate.php#13 | ApiReadingListsCreate ]]
Further details to be added.