[Enhanced CC3200] Describe ESP32-C3 flashing and cc3200tool usage

[SciLor]

Web needs to describe how to prepare the ESP32-C3 as a flasher, how to connect it and what to adjust in the cc3200tool usage.

Flashing ESP32-C3:
https://g3gg0.github.io/ESP32-UART-Gateway/flasher.html
or
https://g3gg0.github.io/ESP32-UART-Gateway/flasher.static.html

Configuration

Use -g / --gateway flag in the command beside the -p. sop2/rts is handled automatically and needs to be connected accordingly to the esp32-c3

https://github.com/toniebox-reverse-engineering/cc3200tool?tab=readme-ov-file#esp32-gateway