feat: export xls with payload

Overview

Create endpoint for export xls for external service

Payload Structure

{
    "header": [
        {
            "key": "name",
            "value": "Nama"
        },
        {
            "key": "address",
            "value": "Alamat"
        },
        {
            "key": "created_at",
            "value": "Created At"
        }
    ],
    "content": [
        {
            "name": "Indra",
            "address": "Bandung",
            "created_at": "2025-01-01 00:00:05"
        },
        {
            "name": "Agung",
            "address": "Subang",
            "created_at": "2025-01-01 00:00:05"
        }
    ]
}