Get all waitlists

curl --request GET \
  --url https://api.letraz.app/api/v1/waitlist/

[
  {
    "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "email": "jsmith@example.com",
    "referrer": "<string>",
    "waiting_number": 123,
    "created_at": "2023-11-07T05:31:56Z"
  }
]