Remove OTA feature about ems-esp32

[MichaelDvP]

OK,
i've used it very few times when i broke the webinterface and don't want to walk stairs, but i think normal users never need it.
Also remove the OTA description from docs.

[proddy]

Ok, I'll do the change now. I've added a script so you can still upload a .bin file from a Linux or DOS prompt

[proddy]

with OTA removed there is 8kb flash free'd up and I'm my ESP32-S3 about 2kb more heap and alloc buffer space.

To upload from platformIO add this to your pio_local.ini

[env]
; upload settings
upload_protocol = custom
custom_emsesp_ip = 10.10.10.173
custom_username = admin
custom_password = admin
upload_port = /dev/ttyUSB*

and include the upload.py script like

extra_scripts =
  pre:scripts/build_interface.py ; comment out if you don't want to re-build the WebUI each time
  scripts/rename_fw.py
  scripts/upload.py

To upload from the command line use

python3 scripts/upload_cli.py -i 10.10.10.173 -f ./build/firmware/EMS-ESP-3_7_0-dev_8-ESP32_4M.bin