조직 목록 조회 (Get all departments)

Example response

{
  "departments": [
    {
      "departmentCode": "10000",
      "parentDepartmentCode": "1000",
      "name": "인사팀",
      "sortOrder": "1001, 1002,..",
      "visible": true,
      "beginDate": "2022-01-01",
      "endDate": "9999-12-31"
    }
  ]
}