Release v2.0.0-beta.2

Second beta in the v2.0 line. Completes the orchestrator/library split for the meshing path, adds a standalone Laplace solver and a parameter-file builder, and wires up multi-platform release artifacts via GitHub Actions.

Highlights

• Three applications from one build tree
  • meshtools3d — the original mesh generator (now CGAL-isolated)
  • laplace_solver — standalone solver built on the new LaplacePipeline
  • parfile_builder — utility for generating parameter files
• MeshingPipeline library — meshing logic extracted into a reusable, CGAL-free library. CGAL is now confined to main.cpp and CGALDataType.hpp, so downstream consumers can link against the library without pulling CGAL into their build.
• LaplacePipeline library — same orchestrator/logic separation applied to the Laplace solve; powers the new laplace_solver app.
• CPack packaging — cpack produces installable archives per platform.
• GitHub Actions release workflow — on published release, builds and uploads artifacts for Ubuntu 22.04 and macOS. Windows is built but allowed to fail while the GetPot / boost::filesystem issues are tracked separately.
• Run provenance — meshtools3d snapshots the resolved parameters and full invocation per run for reproducibility.

Changes since v2.0-beta

• parfile_builder application added (applications/parfile_builder.cpp)
• Release workflow hardened; Windows job marked experimental
• Roadmap updated (Phase 2b complete, Phase 2c noted as optional)

Known limitations

• Windows builds are not guaranteed. The Windows job in CI is marked continue-on-error pending a fix to GetPot / boost::filesystem.
• Beta API: library headers may still shift before 2.0.0 final.
• No Python wrapper yet (Phase 3) and no CGAL upgrade (Phase 4).