samples: sample modified according to the changes in Zephyr macros

main.c file changes
1. Renamed <board.h> to <device.h>
2. <misc/printk.h> now is inserted into <sys/printk.h>
3. <i2c.h> and <gpio.h> now are inserted into
<drivers/i2c.h> and <drivers/gpio.h>
4. Deleted <errno.h> because it is not using
5. Deleted <pwm.h> because it is not using
6. Deleted <display/mb_display.h> because it is not using
in that project (legacy from old project).
7. Now we use the following commands to rename any
SW._GPIO_{CONTROLLER,PIN,FLAGS} to
DT_ALIAS_SW._GPIOS_{CONTROLLER,PIN,FLAGS} ,
so renamed SW0_GPIO_CONTROLLER to DT_ALIAS_SW0_GPIOS_CONTROLLER

prj.conf file changes
1. Deleted CONFIG_SYS_CLOCK_TICKS_PER_SEC=250
because apps shouldn't set tick rate.

Made a line follower robot sample using DFRobot Maqueen chassis
for micro:bit board. Deleted unused files.

Signed-off-by: Maksim Masalski <maxxliferobot@gmail.com>