ESP32-CAM serial support

[jmferrer]

ESP32-CAM serial support 🚀

Serial connection to board does not work in linux because dtr and rts needs to be disabled. This is the configuration needed for Thonny that I tested and works:

[ESP32]
interrupt_on_connect = True
sync_time = True
local_rtc = True
restart_interpreter_before_run = True
dtr = False
rts = False

Link: https://forum.micropython.org/viewtopic.php?t=10151&start=10#p61272