ESP32-S3 support

[benjaminaigner]

Dear all,

if you want to compile this repository for the ESP32-S3 (not officially supported by us, because we are not using it), please note following things:

• BLE4.2 features are not activated by default in esp-idf and will result in many undefined reference errors on linking. I've added the flag to sdkconfig.defaults, so this should not happen
• There is a funny behavior of an endless reset loop with the reason E (427) spi_flash: Detected size(512k) smaller than the size in the binary image header(2048k). Probe failed. This is related to a wrong SPI flash mode. Please set `enable octal flash' in idf.py menuconfig, it works. We will not set the it in sdkconfig.defaults, because it is not tested with the original ESP32.