List canonical line items

curl --request GET \
  --url https://mkk.celebi.me/api/line-items

{
  "total": 123,
  "limit": 123,
  "offset": 123,
  "line_items": [
    {
      "id": 123,
      "slug": "<string>",
      "name": "<string>",
      "sectionId": "<string>",
      "sectionName": "<string>",
      "section": "<string>",
      "unit": "<string>",
      "kind": "<string>",
      "value_count": 123,
      "fund_count": 123,
      "document_count": 123,
      "values": [
        {
          "id": 123,
          "document_id": 123,
          "disclosure_index": "<string>",
          "file_name": "<string>",
          "fund_code": "<string>",
          "fund_title": "<string>",
          "period": "<string>",
          "line_item_id": 123,
          "line_item_slug": "<string>",
          "line_item_name": "<string>",
          "sectionId": "<string>",
          "sectionName": "<string>",
          "canonical_section": "<string>",
          "kind": "<string>",
          "raw_section": "<string>",
          "raw_label": "<string>",
          "value": "<string>",
          "numeric_value": 123,
          "unit": "<string>",
          "source": "<string>",
          "mapping_method": "<string>",
          "mapping_confidence": 123
        }
      ]
    }
  ]
}