Create Attribute Endpoint

Name	Type	Description	Required
`id`	int	The id for the attribute	No
`name`	string	The name of the attribute (e.g., Small or Red)	Yes
`display_name`	string	The display name of the attribute	No
`reference`	string	The reference of the attribute	No
`image`	object	The Image of the attribute	No
`tags`	array	An array of Tag objects	No

Name	Type	Description	Required
`src`	string	The source url of the image	Yes

Name	Type	Description	Required
`name`	string	The name of the tag (e.g., Small or Red)	Yes
`group`	object	The tag group, see Tag Group	Yes

Name	Type	Description	Required
`name`	string	The name of the tag group (e.g., Size or Colour)	Yes

POST /api/attribute-groups/{id|name}/attributes

{
    "name": "Medium",
    "display_name": "Medium"
}

{
    "attribute": {
        "id": 1
    }
}