feat: add geometry arrow stats conversion

[thinh2]

What changes are proposed in this pull request?

This PR adds the Arrow foundation for geometry support in the default engine.
Kernel GeometryType values now map to physical Arrow Binary fields with GeoArrow WKB
extension metadata, while geography remains unsupported in Arrow conversion for now.

It also teaches parse_json_impl to handle geometry stats encoded as WKT strings. The JSON path
decodes geometry leaves through a string-first schema, converts valid WKT values to WKB bytes, and
keeps invalid geometry stats isolated to null cells in the parsed stats batch.

How was this change tested?

cargo test -p delta_kernel --lib --features 'arrow-59 default-engine-base geo-type-in-dev test-utils' geometry -- --nocapture
cargo test -p delta_kernel --lib --features 'arrow-58 default-engine-base geo-type-in-dev test-utils' geometry -- --nocapture
cargo test -p delta_kernel --lib --features 'arrow-59 default-engine-base geo-type-in-dev test-utils' parse_json_safe_cast -- --nocapture
cargo clippy -p delta_kernel --benches --tests --features 'arrow-59 default-engine-base geo-type-in-dev test-utils' -- -D warnings
cargo check -p delta_kernel --no-default-features --features geo-type-in-dev
cargo nextest run --workspace --all-features

[codecov]

Codecov Report

❌ Patch coverage is 89.61039% with 16 lines in your changes missing coverage. Please review.
✅ Project coverage is 90.28%. Comparing base (6dd5a96) to head (2757179).

Files with missing lines	Patch %	Lines
kernel/src/engine/arrow_utils/mod.rs	84.78%	14 Missing ⚠️
kernel/src/engine/arrow_conversion/mod.rs	94.44%	0 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3286      +/-   ##
==========================================
- Coverage   90.28%   90.28%   -0.01%     
==========================================
  Files         251      253       +2     
  Lines       88562    88705     +143     
  Branches    88562    88705     +143     
==========================================
+ Hits        79960    80084     +124     
- Misses       5718     5732      +14     
- Partials     2884     2889       +5     

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[thinh2]

manually constructed the ArrowField metadata matching the the GeoArrow specification.

[thinh2]

pinned an arrow_array v58 for wkt_to_wkb_bytes conversion.

[thinh2]

add comments for reviewers.