working 1d remesh

hysop/__init__.py

hysop/backend/device/codegen/base/cl_extensions.py

hysop/backend/device/codegen/base/function_codegen.py

hysop/backend/device/codegen/base/union_codegen.py

hysop/backend/device/codegen/base/variables.py

hysop/backend/device/codegen/functions/custom_atomics.py

hysop/backend/device/codegen/functions/directional_remesh.py

hysop/backend/device/codegen/kernels/directional_remesh.py

...d/device/codegen/kernels/tests/test_directional_remesh.py

hysop/backend/device/opencl/opencl_types.py