Vendored snapshot of https://github.com/hadilq/type-nn at commit
7333bf79c336396eb2356dd9cfd2f6c9a7676261, plus tnn_py.c/h (the stable
Python ABI). Lives at src/torch_type_nn/native/c so the wheel ships the
sources as package data once — do not also force-include them from csrc/.
