quentinducasse/mcnptoolspro: v1.2.0 - Windows development install fixes

Installation improvements

• Reworked install_dev.py for Windows development installs.
• Added automatic HDF5 setup through local vcpkg when HDF5 development files are missing.
• Avoided the vcpkg CMAKE_TOOLCHAIN_FILE recursion issue by passing explicit HDF5/ZLIB CMake paths.
• Automatically copies required Windows runtime DLLs next to _mcnptools_wrap.pyd:
  • hdf5.dll
  • z.dll
  • aec.dll
  • szip.dll
• Added full installation verification, including an HDF5 PTRAC read test.
• Updated INSTALL.md with the new Windows workflow.

Windows install

After installing Python, CMake, Git, and Visual Studio C++ tools:

python install_dev.py