GeoJSON support

[ilijapuaca]

Parsing GeoJSON data requires additional work in order to add flexibility when it comes to nested types, and the way they are being extracted by using the utility Row class. This likely also includes adding the ability to parse struct-like data into appropriate Arrow types, which seems to be somewhat straight-forward, quick sample:

auto structArray = std::static_pointer_cast<arrow::StructArray>(this->_getChunk("geometry"));
auto coordinates = structArray->GetFieldByName("coordinates");
auto meta = this->_getListArrayMetadata(coordinates, this->_chunkRowIndex);

return this->_getNestedListData(meta.value(), defaultValue);