Implement similar behavior as the ESPHome status_led to aid in troubleshooting

[neilbrookins]

Describe you new feature you'd like

Most esp32 models have an onboard LED. I see that the recommended pinout for the esp-wroom-32 is not using GPIO 2 for any connection to the radio. Therefore, it should be available to blink or light up to indicate any error condition of the firmware. I propose that anytime the Wifi connection fails that the LED should change state. (For example when in AP mode) This way someone looking at the esp32 can see that an abnormal condition is occurring. For specific behavior I'm proposing, I strongly suggest that we standardize on the same behavior that ESPhome has documented to reduce confusion and provide consistency across platforms. See here: https://esphome.io/components/status_led.html