message: Add select python binding for scalar
diff: @@ -174,6 +174,8 @@ PYBIND11_MODULE(scalar, s) {
  m.def("eq", [](Float a, Float b) { return eq(a, b); });
  m.def("neq", [](Float a, Float b) { return neq(a, b); });
  + m.def("select", [](bool a, Float b, Float c) { return enoki::select(a, b, c); });
  +
  bind_scalar_0d(m, s);
  bind_scalar_1d(m, s);
  bind_scalar_2d(m, s);
  