update/merge the result json

`data`, `data_source`, `item_ids`, `languages` could be merged.

```json
{
    "data": {
        "<ItemName>": {
            "dps": { <data> },
            "source": "<data_source>",
            "id": "<item_ids>",
            "translations": { <languages" }
        }
    }
}
```

This should reduce the size of the files and make the structure more sane and concentrated.