In order to bring consistency in-tree, migrate all subsystems code to
the new prefix <zephyr/...>. Note that the conversion has been scripted,
refer to zephyrproject-rtos#45388 for more details.
Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
This change organizes the file structure for the shell.
Files implementing backends are moved to a separate folder.
Signed-off-by: Jakub Rzeszutko <jakub.rzeszutko@nordicsemi.no>