feat(assets): add description field

[catouberos]

migration diff

2259a2260,2273
>                                               "id": "yw37p5ut",
>                                               "name": "description",
>                                               "type": "text",
>                                               "required": false,
>                                               "presentable": false,
>                                               "unique": false,
>                                               "options": {
>                                                       "min": null,
>                                                       "max": null,
>                                                       "pattern": ""
>                                               }
>                                       },
>                                       {
>                                               "system": false,