Tuples in Pretty and Vertical formats should be displayed naturally as subcolumns.

Currently, it works as follows:

```
clickhouse-cloud :) SELECT 'hello' AS x, (1 AS a, 'world' AS b) AS t

SELECT
'hello' AS x,
(1 AS a, 'world' AS b) AS t

Query id: b86cab0c-9ebf-4af6-b911-66f363ae1d6a

┌─x─────┬─t───────────┐
1. │ hello │ (1,'world') │
└───────┴─────────────┘
```

I want it to be like follows:

```
┌─x─────┬─t─────────┐
├───────┼─a─┬─────b─┤
1. │ hello │ 1 │ world │
└───────┴───┴───────┘
```

Note: it is not exactly the same as flattening tuples. We will display the hierarchy in the header.