Demultiplexer field

Hi,

It's a common scenario in CSV files to have a demultiplexer field like:

```java
class RowObject {
public String f1;
public String f2;
public List f3demux;
public String f4;
}

var myExample = new RowObject();
myExample.f1 = "a";
myExample.f2 = "b";
myExample.f3demux = List.of("c1", "c2", "c3");
myExample.f4 = "d";
```

should be mapped like:

```csv
f1, f2, f3demux, f4
a , b, c1, d
a , b, c2, d
a , b, c3, d
```

is there any way to make this happen in `jackson-dataformat-csv`
Having an object that is actually mapped to many rows?

Didn't find any examples or documentation on this matter
Thanks in advance! Great library