add compression of non-imagette data

cmp_tool.c

include/cmp_data_types.h

include/cmp_entity.h

include/cmp_guess.h

include/cmp_icu.h

include/cmp_io.h

include/cmp_rdcu.h

include/cmp_support.h

include/decmp.h

lib/cmp_data_types.c

lib/cmp_entity.c

lib/cmp_guess.c

lib/cmp_icu.c

lib/cmp_icu_new.c

lib/cmp_io.c

lib/cmp_rdcu.c

lib/cmp_support.c

lib/decmp.c

lib/meson.build

lib/rdcu_pkt_to_file.c