Add setup

curl --location 'https://apidev.edufee.online/api/open-payment/setup' \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '{
  "academic_year": "2026",
  "fee_head": "Form Fillup Fee",
  "note": "Form fillup payment for selected students",
  "rule_type": 2,
  "ledger_id": 5,
  "fund_id": 2,
  "start_at": "2026-01-01 00:00:00",
  "end_at": "2026-02-01 23:59:59",
  "guideline_doc":  ,// file
  "disbursements": [
    {
      "gateway": "SSL",
      "account_ref": "SSL-ACC-001",
      "account_name": "SSL Primary Account"
    },
    {
      "gateway": "BKASH",
      "account_ref": "01711111111",
      "account_name": "Bkash Main Wallet"
    }
  ],

  "students": [
    {
      "student_id": "1001",
      "name": "Rahim",
      "mobile": "01711111111",
      "academic_year": "2026",
      "session": "2025-2026",
      "department": "Science",
      "class": "HSC",
      "group": "A",
      "tag": "Regular",
      "amounts": [
        {
          "amount": 300,
          "tag": "1 Subject"
        },
        {
          "amount": 600,
          "tag": "2 Subjects"
        }
      ]
    },
    {
      "student_id": "1002",
      "name": "Karim",
      "mobile": "01722222222",
      "academic_year": "2026",
      "session": "2025-2026",
      "department": "Science",
      "class": "HSC",
      "group": "A",
      "tag": "Special"
    }
  ]
}'