Migrate all dependencies to geozero

[Copilot]

Migrates bambam from individual geospatial crates (wkt, wkb, geojson) to geozero, a unified geospatial format library. This simplifies versioning and APIs for geospatial data formats across the codebase.

Changes Made

Cargo.toml Updates

• Workspace: Removed wkt, wkb, geojson; added geozero with features with-geo, with-wkb, with-wkt, with-geojson
• bambam-osm: Added geozero = { workspace = true } (was missing)
• All other crates (bambam, bambam-core, bambam-gtfs, bambam-omf): removed wkt/wkb/geojson dependencies

Source File Migrations

Old API	New API
wkt::ToWkt → .to_wkt().to_string()	geozero::ToWkt → .to_wkt() returning Result<String>
Geometry::try_from_wkt_str(s)	WktReader(s).to_geo()
wkt::Wkt<f32>::parse() + .try_into()	WktReader(s).to_geo() + map coords to f32
wkb::writer::write_geometry(...)	geom.to_wkb(CoordDimensions::xy())
geojson::GeoJson::parse() + geo_types::Geometry::try_from()	GeoJsonString(s).to_geo()
geojson::Geometry::from() wrapped in geojson::Feature	geom.to_json() wrapped in serde_json::json! Feature

Key technical note: geozero::ToWkt only implements GeozeroGeometry for Geometry<f64>. Geometries stored as f32 (used in several OSM and OMF paths) are converted with geo::Convert before calling to_wkt().

GeoJSON roundtrip: The GeoJSON deserializer now handles Feature-wrapped JSON by extracting the geometry field before passing to GeoJsonString, since geozero's parser requires a plain geometry JSON string.

Unit Tests Added

New tests covering geozero usage without large mock data:

• isochrone_output_format: WKT, WKB, and GeoJSON serialize/deserialize roundtrips; empty geometry; invalid input error cases
• extent_format: WKT polygon and multipolygon parsing; invalid WKT error case
• grid_ops: create_grid_row with polygon geometry; invalid template error case
• us_states_lookup: embedded GeoJSON state file load; GeoJsonString geometry parse

Code Quality

• Ran cargo fmt across the rust/ directory
• Ran cargo clippy --fix across the rust/ directory
• All unit tests pass (cargo test --lib)

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[robfitzgerald]

@copilot please try again now that the copilot rate limit has been addressed. i have added two additional criteria to the list, run cargo fmt and cargo clippy --fix, for acceptance. thank you!

[Copilot]

@copilot please try again now that the copilot rate limit has been addressed. i have added two additional criteria to the list, run cargo fmt and cargo clippy --fix, for acceptan...

Completed the migration in commit a5210de. Here's what was done:

Remaining source files migrated:

• bambam-omf: omf_graph.rs (ToWkt), geometry_wkb_codec.rs (wkb::writer → geozero ToWkb), omf_app.rs (wkt::Wkt parsing)
• bambam-gtfs: operation.rs (ToWkt + TryFromWkt), bundle_ops.rs (ToWkt)
• bambam-osm: osm_way_ops.rs (wkt::Wkt parse + ToWkt), osm_way_data_serializable.rs, osm_graph_vectorized.rs, compass_writer.rs, clustering_rtree.rs (ToWkt), osm_source.rs (TryFromWkt)

Key technical notes:

• geozero::ToWkt only works on Geometry<f64>, so f32 geometries are converted with geo::Convert first
• GeoJSON Feature deserialization now extracts the geometry field before passing to GeoJsonString (avoids geozero failing on "id": null)
• geozero::wkb::Wkb(bytes).to_geo() replaces wkb::reader::read_wkb

Unit tests added for: isochrone_output_format (WKT/WKB/GeoJSON roundtrip), extent_format (WKT parse), grid_ops (create_grid_row), us_states_lookup (embedded GeoJSON load + GeoJsonString parse)

Also ran: cargo fmt and cargo clippy --fix as requested.

[yamilbknsu]

Changes make sense and they compile. Thank you!