As a follow-up to the work done in https://phabricator.wikimedia.org/T396983, we'd like to build a proof of concept for the labels of linked entities functionality in GraphQL on a publicly available wiki like beta or patch demo
**Acceptance criteria: **
- For the endpoint itself, we'll limit it to a GET item/label and a GET item/statement
- Ensure that only the labels of linked entities (statement property and statement value items) can be requested, and not everything else (for example, descriptions or subsequent statements and so on.)
- statement value types that must be supported: string values and item values
- The final endpoint will be exposed through a special page
- if possible, check if we can make it easy to try out via [GraphiQL](https://github.com/graphql/graphiql/blob/main/packages/graphiql/README.md) client on another special page