List all period settings.

Example response

[
  {
    "_id": "62291b7ea8b1619f78818524",
    "period": {
      "_id": "621f802b813dbdba9eeaf7d7",
      "name": "June 2021"
    },
    "setting": {
      "_id": "621f802b813dbdbaddeaf799",
      "key": "SETTING_KEY",
      "value": "666",
      "defaultValue": "555",
      "label": "Quantifiers Per Praise",
      "description": "How many redundant quantifications are assigned to each praise?",
      "periodOverridable": true
    }
  }
]