Is your feature request related to a problem or challenge? Please describe what you are trying to do.
I would like to serialize a logical plan to the datafusion-proto format, from Python.

Describe the solution you'd like
Add Python bindings to datafusion-proto, particularly my use case would require the logical_plan_to_bytes function.

Describe alternatives you've considered
Use Substrait instead of datafusion-proto, however Substrait parity with datafusion-proto is not there yet as tracked in apache/datafusion#8149.