List Companies

curl --request GET \
  --url https://api.proposales.com/v3/companies \
  --header 'Authorization: Bearer <token>'

{
  "data": [
    {
      "id": 123,
      "created_at": 123,
      "name": "<string>",
      "currency": "<string>",
      "tax_mode": "<string>",
      "registration_number": "<string>",
      "website_url": "<string>"
    }
  ]
}