Merge pull request #6674 from astralien3000/feetech

drivers/Makefile.dep

drivers/Makefile.include

drivers/feetech/Makefile

drivers/feetech/feetech.c

drivers/feetech/include/feetech_protocol.h

drivers/feetech/include/feetech_reader.h

drivers/feetech/include/feetech_writer.h

drivers/feetech/reader.c

drivers/feetech/writer.c

drivers/include/feetech.h

drivers/uart_half_duplex/Makefile

drivers/uart_half_duplex/include/uart_half_duplex.h

drivers/uart_half_duplex/uart_half_duplex.c

tests/driver_feetech/Makefile

tests/driver_feetech/README.md

tests/driver_feetech/main.c