python: register Model

clean useless uses of PINOCCHIO_WITH_CXX11_SUPPORT

since C++11 is already enforced in CMakeLists.txt

cmake : sync submodule + fix MathJax relpath, remove DOXYGEN_USE_TEMPLATE_CSS, remove MATHJAX_FORMAT spec

cmake : sync submodule + fix MathJax relpath, remove DOXYGEN_USE_TEMPLATE_CSS, remove MATHJAX_FORMAT spec

Remove small code duplication in CMakelists.txt for ROS2/Ament packaging

Co-authored-by: Joris Vaillant <joris.vaillant@gmail.com>

Mjcf Parser : Fix adding the sites frames

for more information, see https://pre-commit.ci

Co-authored-by: Joris Vaillant <joris.vaillant@gmail.com>

Co-authored-by: Joris Vaillant <joris.vaillant@gmail.com>

Fix var naming in Python

[pre-commit.ci] pre-commit autoupdate

for more information, see https://pre-commit.ci

updates:
- [github.com/pre-commit/mirrors-clang-format: v19.1.1 → v19.1.6](https://github.com/pre-commit/mirrors-clang-format/compare/v19.1.1...v19.1.6)
- [github.com/astral-sh/ruff-pre-commit: v0.6.9 → v0.8.6](https://github.com/astral-sh/ruff-pre-commit/compare/v0.6.9...v0.8.6)

mjcf parser: Fix unknown size vector parsing