List generations

curl --request GET \
  --url https://app.mavera.io/api/v1/generations \
  --header 'Authorization: Bearer <token>'

{
  "object": "list",
  "data": [
    {
      "id": "<string>",
      "object": "generation",
      "title": "<string>",
      "app": {
        "id": "<string>",
        "name": "<string>",
        "category": "<string>"
      },
      "brand_voice": {
        "id": "<string>",
        "label": "<string>"
      },
      "input_data": {},
      "output": "<string>",
      "content_type": "markdown",
      "workspace_id": "<string>",
      "created_at": "2023-11-07T05:31:56Z",
      "updated_at": "2023-11-07T05:31:56Z"
    }
  ],
  "has_more": true,
  "next_cursor": "<string>"
}