Add support for CJ queries

:-)
This is not what `options` in a field is intended for. Options in this sense are the options of a select, i.e.

```
<select ...>
  <option ...> </option>
</select>
```

So `options` is an array of `Yaks::Mapper::Form::Field::Option objects`.

If CJ needs a `rel` and `uri` for a field, then it should get explicit attributes for those, although in that case we also should think about smarter/polymorphic identifiers in Yaks, something I've been pondering about for a while but not 100% sure yet how it should look.