Move spatial bounds and geometry calculations to :core:domain and remove GmsExt

[shobhitagarwal1612]

Towards #3633

Description

Removes presentation-layer GmsExt.kt and moves spherical geometry and bounding box calculations directly into :core:domain. This eliminates a Clean Architecture layer inversion where repositories and ViewModels depended on Google Maps SDK classes, while significantly reducing memory churn during map interactions.

Performance Improvements

• Zero-Allocation Map Render Loop (60fps): Pattern-matched Bounds.contains(Geometry) to avoid calling getShellCoordinates(). This eliminates ephemeral listOf(coordinates) allocations for Point LOIs and eager ArrayList flattening for MultiPolygon on camera pan/zoom updates in BaseMapViewModel.
• $O(N) \to O(1)$ Heap Allocations in Spatial Math: Eliminated transient Google Maps LatLng object allocations per vertex by computing areas and bounding boxes directly on domain primitives.

Functional & Architectural Changes

• Eliminated GmsExt.kt: Migrated area(), center, and contains() to pure KMP domain models (Geometry.kt, Bounds.kt).
• Spherical Area Parity: Added PolygonUtil.calculateSphericalPolygonArea matching SphericalUtil.computeArea using Girard's theorem / polar triangle excess.
• Bounds Factories & Anti-Meridian Handling:
  • Replaced extension functions with explicit companion factories: Bounds.fromCoordinates, fromGeometry, and fromGeometries.
  • Added robust 180th meridian wrapping and normalization for Bounds.fromCoordinates(), shrink(), and center.
• Testing: Added comprehensive unit tests in BoundsTest, GeometryTest, and PolygonUtilTest covering all edge cases.

@andreia-ferreira PTAL?

[codecov]

Codecov Report

❌ Patch coverage is 84.95575% with 17 lines in your changes missing coverage. Please review.
✅ Project coverage is 69.26%. Comparing base (97da8be) to head (e86dfd0).

Files with missing lines	Patch %	Lines
...tlin/org/groundplatform/domain/model/map/Bounds.kt	90.00%	0 Missing and 7 partials ⚠️
...g/groundplatform/domain/model/geometry/Geometry.kt	69.23%	4 Missing ⚠️
...oundplatform/android/ui/common/BaseMapViewModel.kt	0.00%	2 Missing ⚠️
...ollection/tasks/polygon/DrawAreaTaskMapFragment.kt	0.00%	1 Missing ⚠️
...droid/ui/map/gms/features/FeatureClusterManager.kt	0.00%	1 Missing ⚠️
...tlin/org/groundplatform/domain/util/PolygonUtil.kt	95.00%	0 Missing and 1 partial ⚠️
...oundplatform/feature/pdf/mapper/LoiReportMapper.kt	0.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #3911      +/-   ##
============================================
+ Coverage     68.98%   69.26%   +0.28%     
- Complexity     1946     1955       +9     
============================================
  Files           413      412       -1     
  Lines         10964    11015      +51     
  Branches       1429     1452      +23     
============================================
+ Hits           7563     7630      +67     
+ Misses         2656     2636      -20     
- Partials        745      749       +4     

Files with missing lines	Coverage Δ
...android/repository/LocationOfInterestRepository.kt	65.26% <ø> (ø)
.../groundplatform/android/system/GeocodingManager.kt	92.10% <100.00%> (ø)
...acollection/tasks/polygon/DrawAreaTaskViewModel.kt	82.06% <100.00%> (ø)
...me/mapcontainer/HomeScreenMapContainerViewModel.kt	71.42% <ø> (ø)
...ollection/tasks/polygon/DrawAreaTaskMapFragment.kt	50.00% <0.00%> (ø)
...droid/ui/map/gms/features/FeatureClusterManager.kt	76.92% <0.00%> (ø)
...tlin/org/groundplatform/domain/util/PolygonUtil.kt	88.88% <95.00%> (-0.70%)	⬇️
...oundplatform/feature/pdf/mapper/LoiReportMapper.kt	91.54% <0.00%> (ø)
...oundplatform/android/ui/common/BaseMapViewModel.kt	62.99% <0.00%> (-0.50%)	⬇️
...g/groundplatform/domain/model/geometry/Geometry.kt	48.88% <69.23%> (+31.11%)	⬆️
... and 1 more

... and 1 file with indirect coverage changes

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[andreia-ferreira]

awesome! 🚀