map-agent: port AP-Autoconfig to new stack

src/Makefile

src/core/agent.c

src/core/agent.h

src/core/agent_cmdu_generator.c

src/core/agent_cmdu_generator.h

src/core/agent_map.c

src/core/agent_map.h

src/core/agent_tlv_generator.c

src/core/agent_tlv_generator.h

src/core/agent_ubus.c

src/core/config.c

src/core/config.h

src/utils/debug.c