continue e1AP development

CMakeLists.txt

common/ngran_types.h

executables/cuup.c

executables/nr-softmodem.c

openair1/PHY/NR_TRANSPORT/nr_ulsch_demodulation.c

openair1/SCHED_NR_UE/phy_procedures_nr_ue.c

openair2/E1AP/e1ap.c

openair2/E1AP/e1ap.h

openair2/E1AP/e1ap_api.c

openair2/E1AP/e1ap_api.h

openair2/E1AP/e1ap_common.c

openair2/E1AP/e1ap_common.h

openair2/E1AP/e1ap_setup.c

openair2/F1AP/f1ap_du_task.c

openair2/LAYER2/nr_pdcp/nr_pdcp_oai_api.c

openair2/RRC/NR/cucp_cuup_direct.c

openair2/RRC/NR/nr_rrc_defs.h

openair2/RRC/NR/rrc_gNB.c

openair2/RRC/NR/rrc_gNB_radio_bearers.c

openair2/RRC/NR/rrc_gNB_radio_bearers.h