Jackson has no first-principles way to emit tabular form / inline CSV

See (tabular-array.toon)[https://github.com/toon-format/spec/blob/main/examples/valid/tabular-array.toon]:

```
users[3]{id,name,role,active}:
  1,Alice,admin,true
  2,Bob,developer,true
  3,Charlie,designer,false
```

Given the overlap with CSV, may be a notational solution looking for a problem.  Maybe an `Iterable` of POJOS where all fields are of simple type or some such.