Add a possibility to instantiate schema type instance

Inspired by #309 (https://github.com/Kotlin/dataframe/issues/309#issuecomment-1482237061).

Would be nice to get an instance of actual class.
Something like

```kt
fun DataRow.toInstance(): T
```

```kt
data class Point(val x: Double, y: Double) {
fun countF(): Double = x * x + y * y
}

df.cast().add("f") {
toInstance().countF()
}
```

In fact we have it now for the whole `DataFrame` — `toList()` and `toListOf()`, and now you can do it like.
```
dataRow.toDataFrame().toList().single()
```

Start by reading the existing DataFrame toList() and toListOf() conversion paths, then compare them with DataRow and the toDataFrame().toList().single() workaround shown in the issue. The feature is complete when a typed row supports the proposed toInstance() usage and the Point example can call countF() successfully.

Written by the indexing model from the issue text.