ToGo compatibility gaps with Shapely

[mindflayer]

Summary

This MR closes key ToGo compatibility gaps observed in MBP by improving Shapely-parity APIs and multi-geometry behavior.

What changed

• Added native module helpers:
  • shape(...) for GeoJSON dict/string and __geo_interface__ inputs
  • box(minx, miny, maxx, maxy, ccw=True)
• Made multi-geometry symbols class-based for stable typing:
  • MultiPoint and GeometryCollection are now classes (not function factories), improving isinstance behavior.
• Added Geometry.geoms for multi/collection geometries:
  • Supports MultiPoint, MultiLineString, MultiPolygon, and GeometryCollection.
• Extended Geometry.__getitem__ to support MultiPoint indexing.
• Improved boundary parity:
  • Polygon.boundary now includes hole boundaries (returns MultiLineString when holes exist).
  • MultiPolygon.boundary now includes boundaries for both exteriors and holes.
• Exported new helpers via __all__.

Tests

• Added/updated compatibility coverage in:
  • tests/test_shapely_api.py
  • tests/test_pickle_boundary_compat.py
• Validated with:

125 passed across tests/test_shapely_api.py and tests/test_pickle_boundary_compat.py.

Why this matters

These changes reduce downstream shims in MBP by providing missing native API surface and more predictable geometry typing/serialization behavior.

[Copilot]

Pull request overview

This PR aims to close key Shapely-compatibility gaps by expanding module-level helpers, stabilizing multi-geometry typing, and improving multi/collection traversal and boundary behavior.

Changes:

• Added Shapely-style helpers shape(...) (GeoJSON / __geo_interface__) and box(...), and exported them via __all__.
• Converted MultiPoint and GeometryCollection from factory functions into classes to support stable isinstance checks; added Geometry.geoms for multi/collection child access; extended Geometry.__getitem__ to support MultiPoint indexing.
• Updated boundary handling for polygonal multi-geometries and expanded test coverage; bumped project version to 0.4.5.

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 2 comments.

File	Description
togo.pyx	Adds shape/box, introduces class-based MultiPoint/GeometryCollection, adds .geoms, extends indexing, and adjusts boundary logic for polygonal geometries.
tests/test_shapely_api.py	Adds/extends Shapely-parity tests for shape, box, and .geoms.
tests/test_pickle_boundary_compat.py	Extends pickle roundtrip coverage to include MultiPoint and GeometryCollection.
pyproject.toml	Bumps version from 0.4.4 to 0.4.5.