Code lists API for suggester component

[romaintailhurat]

A new feature is currently deployed in Insee data collection system: a suggester component, allowing autocompletion search when answering a question.

Currently, integrating this component is not fully automated, for example the designer can not declare the use of this component in Pogues (though it's a target).

In order to further automate, we want to provide an API for serving the underlying code list.