1. Fix UE_CONTEXT_SETUP_REQUEST and CONTEXT_MODIFICATION_REQUEST encode/decode
2. Add gNB_DU_CONFIGURATION_UPDATE and gNB_CU_CONFIGURATION_UPDATE procedure
3. Add C_RNTI_TO_BIT_STRING function
4. Add INITIAL_UL_RRC_MESSAGE_TRANSFER procedure and with mac_du_data_ind (MSG3)
5. Add GNB-CUSystemInformation extension part for the F1SetupResponse procedure