feat(rust/sedona-geoparquet): Add GeoParquet writer for non-spatial output

[paleolimbot]

This PR adds a writer for Parquet that writes GeoParquet metadata for output with spatial columns. Currently this doesn't write a bbox because that requires something a bit more sophisticated than just popping some metadata into the Parquet write options.

import sedonadb

sd = sedonadb.connect()

sd.sql("SELECT ST_SetSRID(ST_GeomFromText('POINT (0 1)'), 4326) as geometry").to_parquet("foofy.parquet")
sd.read_parquet("foofy.parquet").show()
#> ┌────────────┐
#> │  geometry  │
#> │  geometry  │
#> ╞════════════╡
#> │ POINT(0 1) │
#> └────────────┘

[Copilot]

Pull Request Overview

This PR adds support for writing GeoParquet files in Sedona's Rust implementation by implementing a GeoParquet writer that properly handles spatial columns. The changes enable DataFrames containing spatial data to be written to Parquet format with appropriate GeoParquet metadata.

Key changes:

• Added write_geoparquet method to the SedonaDataFrame trait with support for custom write options
• Implemented GeoParquet metadata generation and physical plan creation for writing spatial data
• Extended Python API with to_parquet method for DataFrame objects supporting partitioning and sorting

Reviewed Changes

Copilot reviewed 15 out of 16 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
rust/sedona/src/context.rs	Added write_geoparquet method and SedonaWriteOptions struct for DataFrame writing
rust/sedona-geoparquet/src/writer.rs	New writer implementation with GeoParquet metadata generation
rust/sedona-geoparquet/src/options.rs	New options struct for GeoParquet version configuration
rust/sedona-geoparquet/src/metadata.rs	Added Default implementations for metadata structs
rust/sedona-geoparquet/src/format.rs	Updated format factory to support writer functionality
python/sedonadb/python/sedonadb/dataframe.py	Added to_parquet method to Python DataFrame API
python/sedonadb/src/dataframe.rs	Rust implementation of Python to_parquet method

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[paleolimbot]

@jiayuasu Only V1_0 is implemented in this PR, but is this is what I had in mind for how a user will specify output.

[jiayuasu]

I think this is good enough. Since this PR follows V1_0, does it have bbox value in its file metadata?

[paleolimbot]

Not in this PR, because that requires a true override/copy of the ParquetSink. I will probably try V1_1 before attempting that (also doesn't involve an override of the sink because it is a simple projection).