**//NOTE: This endpoint is deprecated. If there are no callers, we may not need to implement it. We should confirm whether or not this endpoint is needed before working on it. If the endpoint is not needed, we can close this task as Invalid.//**
Create a REST handler and any other necessary associated code (extension.json entry, helper classes, etc.) for the `lists` POST endpoint.
[] endpoint implemented
[] tests created
[] tests pass
**Endpoint summary:**
Create a new list for the current user.
**Endpoint description:**
Creates a new empty list. On name conflict, does nothing and returns the data of an existing list.
Request must be authenticated with a MediaWiki session cookie.
Stability: [unstable](https://www.mediawiki.org/wiki/API_versioning#Unstable)
This endpoint is deprecated and might be removed without warning. Use the batch version instead.
Further details to be added.