json flattening

[Somfic]

being able to go from:

        {
            "order": {
                "id": 123,
                "customer": {
                    "name": "Jane Doe",
                    "email": "jane@example.com"
                },
                "items": [
                    { "name": "Item1", "price": 10.50 },
                    { "name": "Item2", "price": 25.99 }
                ],
                "total": 36.49,
                "orderDate": "2025-11-21T09:00:00Z"
            }
        }

to:

"order.id": 123
"order.customer.name": "Jane Doe"
"order.customer.email": "jane@example.com"
"order.items[0].name": "Item1"
"order.items[0].price": 10.50m
"order.items[1].name": "Item2"
"order.items[1].price": 25.99m
"order.items.Length": 2
"order.total": 36.49m
"order.orderDate": "2025-11-21T09:00:00Z"