Is there a way to render pretty json?

**Which part is this question about**

generating json using `json::ArrayWriter`

**Describe your question**

is there a way to pretty write JSON data?

i.e.

instead of

```json
[{"foo": "bar", "baz": "zee"}]
```

render

```json
[
{
"foo": "bar",
"baz": "zee"
}
]
```

**Additional context**

This is currently how I'm doing it:

```rust
let mut writer = json::ArrayWriter::new(Vec::new());

writer.write_batches(&batches)?;
writer.finish()?;

return Ok(String::from_utf8(writer.into_inner())?);
```

Start at the `json::ArrayWriter` entry point and inspect its available configuration, documentation, and related JSON-writing code. Determine whether pretty output is already supported or whether the request requires a defined API change; done means the supported behavior or requested scope is documented and covered by an appropriate test.

Written by the indexing model from the issue text.