update github workflows

[FilipovicLado]

• CMakeLists.txt, cmake/vtk.cmake: package builds now use bundled VTK 9.3.1 with OpenMP SMP enabled, patch VTK sources before compilation, avoid VTK STDThread/MSVC linker issues, and select LLVM OpenMP correctly on MSVC.
• python/CMakeLists.txt: Windows package builds now locate and install libomp140.x86_64.dll into viennals.libs, while avoiding huge .lib files in the wheel.
• .github/workflows/python.yml: cibuildwheel now builds configured package wheels directly, covers Intel macOS, runs import smoke checks, and inspects wheel contents for the OpenMP runtime and deprecated symbol.
• .github/actions/setup/action.yml: macOS setup handles both macos-latest and macos-15-intel, installs libomp, and removes noisy untrusted Homebrew taps.
• build.yml, docs.yml, format.yml: CI actions were updated, Windows vcpkg caching was changed to cache vcpkg_installed, and Intel macOS was added to build coverage.
• include/viennals/lsMesh.hpp: fixes an MSVC narrowing warning by explicitly casting std::distance / newNodes.size() to unsigned.