EZP-21681 Implement ContentTypeList without Identifier or RemoteId 

JIRA link: https://jira.ez.no/browse/EZP-21681
## Description 
The goal here is to implement in the REST ressource that can get the whole list of contentType.
The ressource can be call with `GET /api/ezp/v2/content/types`

We can choose some parameters: an offset, a limit, a sort, and an orderby  which are all optionnal.
e.g. `GET /api/ezp/v2/content/types?offset=5&limit=3` 

The specs are from https://github.com/ezsystems/ezpublish-kernel/blob/master/doc/specifications/rest/REST-API-V2.rst#list-content-types