Rust version of anim_to_vtk

[laurent-altr]

Expected to be much faster (5-50x) than the C++

[Copilot]

Pull request overview

This PR replaces the C++ implementation of anim_to_vtk with a new Rust implementation, claiming 5-50x performance improvements. The rewrite adds support for binary VTK output, multi-threaded processing, and a legacy ASCII formatting mode for backward compatibility.

Changes:

• Complete rewrite of anim_to_vtk from C++ to Rust with custom formatters and optimized I/O
• New features: binary VTK output, parallel file processing, memory-aware thread pooling
• Updated build scripts to use Cargo instead of C++ compilers, comprehensive documentation updates

Reviewed changes

Copilot reviewed 7 out of 8 changed files in this pull request and generated 15 comments.

Show a summary per file

File	Description
output_converters/anim_to_vtk/src/main.rs	New 2300-line Rust implementation with custom number formatting, VTK writer abstraction, and parallel processing
output_converters/anim_to_vtk/Cargo.toml	Cargo manifest defining the Rust project with ryu dependency for fast float formatting
output_converters/anim_to_vtk/win64/build.bat	Modified Windows build script to invoke cargo instead of Visual C++ compiler
output_converters/anim_to_vtk/linux64/build.bash	Modified Linux x64 build script to invoke cargo and copy executable to exec directory
output_converters/anim_to_vtk/linuxa64/build.bash	Modified Linux ARM64 build script to invoke cargo and copy executable to exec directory
output_converters/anim_to_vtk/README.md	Extensive documentation updates covering new features, usage examples, and format options
output_converters/anim_to_vtk/PERFORMANCE.md	New performance analysis document explaining optimization techniques and speedup claims
.gitignore	Added Rust-specific ignore patterns (target/, Cargo.lock, exec/)

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