Please prohibit using GPIOs already in use by external memory

[karlkloss]

There are certain pins of the various ESP32 chips, that are used to access external memory, which may either be integrated into the chip package, or externally on the PCB.
Annex allows it to define these pins as GPIOs, and write to them, usually resulting in the ESP32 crashing and restarting.

Please add a function that prohibits using these pins when external memory is detected.

I also walked into this trap, because the ESP32-S3 datasheet only mentions the pins in a small footnote, that I overlooked.

[cicciocb]

Yes, I take the point but it is a little bit complicate considering the different chips (-S2, -C3 , ...) and the different memory options (PSRAM or not, QIO, OQPI, OPI, ...)