List inboxes

curl --request GET \
  --url https://api.usenaive.ai/v1/email/inboxes \
  --header 'Authorization: Bearer <token>'

{
  "inboxes": [
    {
      "id": "<string>",
      "address": "<string>",
      "domain": "<string>",
      "status": "<string>"
    }
  ]
}