Create a ledger

curl --request POST \
  --url https://app.gomangrove.com/api/v1/projects/{project_id}/ledgers \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "ledger": {
    "name": "Net Carbon Removal",
    "unit": "t"
  }
}
'

{
  "id": "lgr_abc123def456",
  "name": "Net Carbon Removal",
  "unit": "t",
  "system_ledger_type": null,
  "partition_type": null,
  "cadence": null,
  "latest_model": null,
  "asset_category": null,
  "created_at": "2025-01-15T10:00:00.000Z",
  "updated_at": "2025-01-15T10:00:00.000Z"
}