Restore the factory firmware .bin not using Espressif Flash Download Tool

[csvke]

Current Situation

Some may want to restore the firmware of the device to the one from the factory, but isn't using a Windows PC (AFAIK Espressif's Flash Download Tool only has Windows binary)

Proposed Change

The vendor's documentations / files does contain the firmware's binary in JC3248W535EN/8-Burn operation/Burn files

One can use esptool to burn the firmware by running this command in the root directory of your project:

esptool.py --chip esp32s3 --port /dev/cu.usbmodem114201 write_flash 0x0 JC3248W535EN/8-Burn\ operation/Burn\ files/JC3248W535C_I_Y.bin

Replace /dev/cu.usbmodem114201 to your upload port.

If esptool is missing, simply run:
pip install esptool

Additional Context

@NorthernMan54 you may want to add that to your readme if you fancy.

[NorthernMan54]

If you could do a pull request with the change,
Much appreciated