Rust-based JavaScript tooling

The Rust React Compiler cut a 1,036-file compile step from 14.3s to 0.81s

A 1,036-file React Router build ran its compile step in 0.81 seconds on oxc's native React Compiler, down from 14.3 under Babel, and the whole build still takes 9.3. Opting in needs one config key and Vite v8.