test: extend testing suite to include skeleton, raycast and animation_player

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Greptile Overview

Greptile Summary

This PR significantly extends the test suite by adding comprehensive unit tests for skeleton, raycast, and animation player components, along with W3D parser tests for hierarchy, animation, and HLod formats.

Key additions:

• Render module tests: raycast intersection algorithms, animation playback control, skeleton pose computation, bounding box operations, and texture loading
• W3D parser tests: binary chunk parsing for hierarchy, animation (standard and compressed), and HLod structures
• Build configuration: new test executables properly configured with GLM dependencies and appropriate compiler flags

Test quality highlights:

• Tests follow TDD principles mentioned in CLAUDE.md
• Comprehensive edge case coverage (empty inputs, boundary values, invalid data)
• Tests are well-structured with clear test fixture helpers for binary chunk creation
• Proper use of Google Test framework (TEST_F, ASSERT/EXPECT macros)
• Tests align with 2-space indentation standard per style guide

All tests appear well-designed with no logical errors, proper assertions, and good coverage of both success and failure paths.

Confidence Score: 5/5

• Safe to merge - well-structured tests with no issues found
• All test files are properly implemented with comprehensive coverage, correct assertions, and good edge case handling. The CMake configuration properly links dependencies and sets compiler flags. Tests follow the project's TDD approach and coding standards.
• No files require special attention

Important Files Changed

Filename	Overview
tests/CMakeLists.txt	Added build configurations for new test executables (skeleton_tests, bounding_box_tests, raycast_tests) with proper dependencies and compiler flags
tests/render/raycast_test.cpp	Comprehensive raycast tests covering triangle, sphere, and line segment intersection with edge cases and Vulkan Y-flip projection handling
tests/render/test_animation_player.cpp	Thorough animation player tests covering loading, playback control, all playback modes (Once, Loop, PingPong), and edge cases
tests/render/test_bounding_box.cpp	Complete bounding box tests validating expansion, center, size, radius calculations, and validity checks with edge cases
tests/render/test_skeleton_pose.cpp	Extensive skeleton pose tests covering rest pose computation, animated poses, parent-child transforms, and inverse bind pose matrices
tests/render/test_texture_loading.cpp	Standalone texture parser tests for DDS and TGA formats with case-insensitive path resolution for cross-platform compatibility
tests/w3d/test_animation_parser.cpp	Binary parser tests for W3D animation chunks including standard and compressed animations, multiple channels, and bit channels
tests/w3d/test_hierarchy_parser.cpp	W3D hierarchy parser tests validating pivot parsing, quaternion rotations, parent-child relationships, and pivot fixups
tests/w3d/test_hlod_parser.cpp	HLod parser tests covering LOD arrays, aggregate arrays, proxy arrays, box parsing, and multi-level LOD configurations

Context used:

• Context from dashboard - CLAUDE.md (source)
• Context from dashboard - CLAUDE.md (source)

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