rlx 0.2.1

RLX — small ML compiler + runtime for transformer inference and training. JAX-shaped IR, autodiff, vmap, on top of CPU / Apple Silicon (Metal / MLX) / NVIDIA / AMD / TPU / wgpu backends. This is the prelude crate; pulls in rlx-ir / rlx-opt / rlx-runtime and re-exports the common types.