Cesium for Unreal v.2.27.0

This release includes support for Unreal Engine v5.5, v5.6, and v5.7 for Windows, Linux, macOS, Android, and iOS. Please select the appropriate ZIP for your version.

• Unreal Engine 5.5: CesiumForUnreal-55-v2.27.0.zip
• Unreal Engine 5.6: CesiumForUnreal-56-v2.27.0.zip
• Unreal Engine 5.7: CesiumForUnreal-57-v2.27.0.zip

Additions 🎉

• Added CesiumVectorTilesRasterOverlay supporting vector data loaded from 3D Tiles tilesets.
• Added support for displaying points in CesiumGeoJsonDocumentRasterOverlay and CesiumVectorTilesRasterOverlay.
• Added support for rendering edges from the EXT_mesh_primitive_edge_visibility extension.

Fixes 🔧

• Added missing includes that introduced compilation failures when building the plugin from source against UE 5.7's bundled clang 20.1.8 toolchain (introduced in v2.25.0 by #1685; binary plugin users were unaffected).
• Fixed the case where glTF line primitives caused excessive log spam due to Chaos attempting to generate physics bodies for small non-triangle meshes.
• Fixed an incorrect transform that reversed the appearance of data in box voxel tilesets.
• Fixed a crash in UCesiumGaussianSplatSubsystem::Tick when GetPrimaryWorld() returns nullptr (e.g. between PIE shutdown and Standalone-Game launch, or on nDisplay secondary nodes during world bind-up). Restores the validity check ordering that shipped in v2.24.1 and was inadvertently inverted in v2.26.0 (#1841).

In addition to the above, this release updates cesium-native from v0.60.0 to v0.61.0. See the changelog for a complete list of changes in cesium-native.