[python/multibody] fix include order in frames.cpp

[ManifoldFR]

Hi !

We've noticed a compilation issue under pinocchio 3x: on devel, we're getting the following compiler error (or a variation of it, repeated a few times):

In file included from /home/manifold/git-repos/crocoddyl/bindings/python/crocoddyl/multibody/frames.cpp:12:
In file included from /home/manifold/mambaforge/envs/pin3/include/pinocchio/bindings/python/utils/std-aligned-vector.hpp:14:
/home/manifold/mambaforge/envs/pin3/include/pinocchio/bindings/python/utils/std-vector.hpp:289:50: error: use of undeclared identifier 'NumericalBase'; did you mean 'Eigen::NumericalIssue'?
      boost::mpl::if_<typename boost::is_base_of<NumericalBase<T>,T>::type,has_operator_equal< NumericalBase<T> >,
                                                 ^
/home/manifold/mambaforge/envs/pin3/include/eigen3/Eigen/src/Core/util/Constants.h:434:3: note: 'Eigen::NumericalIssue' declared here
  NumericalIssue = 1, 
  ^

(The compiler is Clang 15, but the same happens on GCC 13, AFAIK).
The struct it's referring to is the template struct pinocchio::NumericalBase from Pinocchio's fwd header but obviously the compiler can't see it.

The Pinocchio bindings' bindings/utils/std-aligned-vector.hpp header (or even std-vector.hpp) needs to be included after the Pinocchio fwd header which defines the struct. I think these headers maybe used to include <pinocchio/fwd.hpp> before but I'm not sure. The include order before the change looks a bit odd though: maybe the pre-commit bot reordered the includes by alphabetical order?