fix: missing skinned vertex stubs

[ViTeXFTW]

• Merge after build: add appropriate compile flags to cmake presets #34

Greptile Overview

Greptile Summary

Added missing SkinnedVertex stub to test pipeline header, fixing test compilation. Also implemented comprehensive hover detection system with raycasting for meshes, bones, and joints, including UI tooltips and visual highlighting. Additional improvements include build optimization flags and more reliable shader embedding via file-based approach.

Confidence Score: 5/5

• This PR is safe to merge with no critical issues found
• The changes are well-tested with comprehensive raycast tests, follow established patterns, and properly handle edge cases. The main fix (missing SkinnedVertex stub) is straightforward and necessary for test compilation.
• No files require special attention

Important Files Changed

Filename	Overview
tests/stubs/core/pipeline.hpp	Added missing SkinnedVertex stub for tests
src/render/raycast.cpp	Implemented raycasting functions using Möller-Trumbore and geometric algorithms
src/render/hover_detector.cpp	Implemented hover detection with priority for skeleton over meshes
src/main.cpp	Integrated hover detection with UI tooltip and rendering pipeline
tests/w3d/test_mesh_parser.cpp	Fixed vertex influences test to match W3D format (8 bytes per vertex)

[greptile-apps]

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[ViTeXFTW]

Closed in favor of #37