Better rendering of multiline strings in Pretty formats

Currently, it works as follows:

`SELECT 'hello\nworld' AS x, 123 AS y`

```
┌─x──────────┬───y─┐
│ hello
world │ 123 │
└────────────┴─────┘
```

But should work as follows:

```
┌─x─────┬───y─┐
│ hello…│ 123 │
│…world │     │
└───────┴─────┘
```