HIP and Spack

New features:

• HIP compatibility without requiring the source code to be hipified
• CMake changes to allow easier integration with Spack

SPH-EXA is now available in Spack. A separate package for Cornerstone octree will follow

CUDA 12.5 compatibility

Fixes:

• Full encapsulation of thrust::device_vector, because starting from CUDA 12.5 inclusion of its in .cpp files is no longer possible

New features:

• Refine LET resolution at surface after domain boundary changes
• Prune LET nodes outside focus that exceed the LET resolution on the owning rank

Hierarchical block time steps

Supporting functionality for hierarchical block-time steps in SPH-EXA