feat: Refactor GET /documents to return minimal fields

[Kahtaf]

Sample response:

[
  {
    "id": 1,
    "created_at": "2024-02-26T14:27:59.248480",
    "updated_at": "2024-02-26T14:27:59.248495",
    "content_type": "text/plain",
    "name": "todo",
    "size": 82514,
    "connector_name": "whatsapp"
  },
  {
    "id": 2,
    "created_at": "2024-02-26T14:28:01.027026",
    "updated_at": "2024-02-26T14:28:01.027037",
    "content_type": "text/plain",
    "name": "todo",
    "size": 82514,
    "connector_name": "whatsapp"
  }
]

[Kahtaf]

Only changes made to this file are in get_documents, rest are formatting changes