Expose DataFileSerde as functions #1562
Description
Is your feature request related to a problem or challenge?
Right now DataFileSerde is not usable outside spec crate.
Serde datafiles can actually be useful at some times. In the ongoing DataFusion write support work, write node will write data and generate data files, and it would be ideal to serialize data files and pass them to commit node for the distributed execution.
Describe the solution you'd like
We don't have to expose DataFileSerde directly. Instead, we can expose the serde functions:
pub fn serialize_data_file_to_json
pub fn deserialize_json_to_data_file
Willingness to contribute
I can contribute to this feature independently