Merge branch 'fhennig/include-cleanup' into 'v2.0-dev'

src/pystencils/backend/platforms/cuda.py

src/pystencils/include/PyStencilsField.h

src/pystencils/include/pystencils_runtime/half.h

src/pystencils/include/pystencils_runtime/hip.h

src/pystencils/jit/gpu_cupy.py

src/pystencils/types/types.py