Changes to Get one creature

added the new character_taken enum value to the allOf[subschema #1: Error]/error/code response property for the response status 410

added the new character_taken enum value to the error/code response property for the response status 401

added the new character_taken enum value to the error/code response property for the response status 403

added the new character_taken enum value to the error/code response property for the response status 404

added the new character_taken enum value to the error/code response property for the response status 422

added the new character_taken enum value to the error/code response property for the response status 429

added the new character_taken enum value to the error/code response property for the response status 503

added the new world_full enum value to the allOf[subschema #1: Error]/error/code response property for the response status 410

added the new world_full enum value to the error/code response property for the response status 401

added the new world_full enum value to the error/code response property for the response status 403

added the new world_full enum value to the error/code response property for the response status 404

added the new world_full enum value to the error/code response property for the response status 422

added the new world_full enum value to the error/code response property for the response status 429

added the new world_full enum value to the error/code response property for the response status 503

added the optional property known_of to the response with the 200 status