- rename printer protocol helpers to driver-centric names\n- remove image download coex preference code and config\n- drop esp_coex dependency from domain\n- remove unused set_black helper to keep build warning-free
- rename printer protocol helpers to driver-centric names\n- remove image download coex preference code and config\n- drop esp_coex dependency from domain\n- remove unused set_black helper to keep build warning-free