int_conv: Add more integer type binding and add a unit test

changelog: Add changelog entry

int_conv: Manage int8_t and long on Windows

int_conv: Try to use stdint type to manage long hack on windows

int_conv: Fix Windows build

int_conv: Try to fix Mac build and don't compile twice 64 bits integer on Mac and Windows

int_conv: Don't use np.dtypes (introduced in numpy 1.25)

int_conv: Test long and int difference in unit test

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int_conv: Expose long in MacOS

int_conv: Don't use deprecated type np.intc

int_conv: Fix Mac build

int_conv: Remove int128 (doesn't exists)

int_conv: Disable long long test on Mac because the type is not reachable

int_conv: Begin to work on promotion

int_conv: Add unsigned promotion

int_conv: Manage complex promotion

int_conv: Split matrix binding to avoid memory issue while building

int_conv: Split decomposition binding to avoid memory issue while building

int_conv: Use clongdouble instead of complex256

int_conv: Avoid out of heap space error on Windows

int_conv: Fix test for Mac

int_conv: Try to manage longlong on Mac and int on Windows, also reduce compile time

int_conv: Manage Windows and Mac int and long long when casting

int_conv: Allow scalar to complex conversion

int_conv: Manage casting from numpy to eigen with tensor

int_conv: Add changelog entries

int_conv: Remove conversion from Eigen to Numpy

int_conv: Add reference to this PR

int_conv: Activate SciPy tests by default

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This feature is only available on Mac OS X, with Eigen >= 3.4.90

* optional: check registration of none type and optional type

* core: remove useless include

* core: fix include

---------

Co-authored-by: Justin Carpentier <justin.carpentier@inria.fr>

* optional: expose to-value converter for boost::none_t (and std::nullopt_t if possible)

+ add src/optional.cpp to expose none types
+ this allows to have None as a default arg value for functions (also, shows up in stubs)
+ also allows to have none_t return/argument type

* Run pre-commit

* bp::extract will construct an Eigen::Ref on the fly as an rvalue using the registered converter
* move overload_base_get_item_for_std_vector from pinocchio to here -- changes behaviour of __getitem__
* redef exposeStdVectorEigenSpecificType to overload the boost vector_indexing_suite __getitem__
* move exposeStdVectorEigenSpecificType to std-vector.hpp header

* add test_std_vector.py
* fix copyable.hpp's include guards & namespace
* same for pickle-vector
* expose std::vector for VectorXd, MatrixXd, VectorXi, MatrixXi

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- [github.com/pre-commit/mirrors-clang-format: v14.0.6 → v15.0.4](https://github.com/pre-commit/mirrors-clang-format/compare/v14.0.6...v15.0.4)

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Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

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