* Bump Eigen submodule to 5.0.0 Updates Dependencies/eigen from a pre-3.5 dev snapshot (87300c93c, 2023-04-17) to the released 5.0.0 tag (549bf8c75, 2025-09-28). Why this closes #67 ------------------- Issue #67 asks that we follow Eigen's struct-having-Eigen-members guidance to ensure correct alignment of Eigen members. The Eigen 5.0 release notes resolve this at the library level: > Eigen now uses the c++11 alignas keyword for static alignment. > Users targeting C++17 only and recent compilers (e.g., GCC>=7, > clang>=5, MSVC>=19.12) will thus be able to completely forget about > all issues related to static alignment, including > EIGEN_MAKE_ALIGNED_OPERATOR_NEW. NAM already requires C++20 (see CMakeLists.txt). With Eigen 5.0, the README "Sharp edges" workarounds (EIGEN_MAX_ALIGN_BYTES=0, EIGEN_DONT_VECTORIZE) are no longer needed. A follow-up commit can remove that section. Refs #67. * Bump Eigen submodule 5.0.0 -> 5.0.1 Picks up 5.0.1 patch fixes, notably alignment fixes (#2982, #2984) and a missing C++20 <version> header (#2986) - both directly relevant to NAM's C++20 build and to the alignment issue this PR closes (#67). Local matrix re-verified (macOS, AppleClang, C++20): - default + inline GEMM: clean build, run_tests pass - render output bit-exact vs 5.0.0 (default and inline hashes unchanged)