Add HDF5 file writing to `exp` and HDF file reading to `pyEXP` [WIP] #824

Job	Run time
Test pyEXP Build (ubuntu-24.04, gcc, g++)	13m 36s
Test pyEXP Build (ubuntu-24.04, clang, clang++)	16m 9s
Test pyEXP Build (ubuntu-22.04, clang, clang++)	16m 9s
Test pyEXP Build (ubuntu-22.04, gcc, g++)	13m 42s
	59m 36s

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