xpile 0.0.1

Polyglot transpile workbench (Python/C/C++/Rust/Ruchy/Lean ↔ Rust/Ruchy/PTX/WGSL/SPIR-V) with provable contracts at every layer. v0.0.1 is a name reservation; the real CLI lands in v0.1.0+ — see the GitHub repo.