[Feature Request]: JSON Input get key name and value by attribute index

### What would you like to happen?

I would like to set a jsonPath in JSON Input to get the key name and key value for a given attribute index.

For example, considering the json below and the following jsonPaths:

```
{
"doc.tipo": "XG",
"pk_dt_update": "2024-09-13 08:55:16.954",
"pk_orgao": "ssx",
"pk_base_dados": "XG",
"pk_documento": "0000",
"tipo_registro": "dados",
"tipo_documento": "pf"
}
```
```
key_name: $.[0].name()
key_value: $.[0]
```
I would like to have:

```
key_name: "doc.tipo"
key_value: "XG"
```

### Issue Priority

Priority: 3

### Issue Component

Component: Transforms

The report names the JSON Input transform and its jsonPath expressions; start by locating that transform and how it resolves attribute indexes. No file or test is named. Done means the example paths return the first key name as "doc.tipo" and its value as "XG".

Written by the indexing model from the issue text.