New release Autumn 2025

The latest tag was done ~2 years ago, and we need a new release anyhow for Eigen3 5.0.0 compatibility. Can we do a new release? Thanks! @S-Dafarra @GiulioRomualdi 

xref: https://github.com/robotology/robotology-superbuild/issues/1902
xref: https://github.com/robotology/robotology-superbuild/issues/1903
xref: https://github.com/conda-forge/eigen-feedstock/pull/47