We recently added a `[target.xtensa-esp32s3-none-elf]` key in the root
.cargo/config which override the rustflag sets in the
cargo-config.toml, so put the flags in the same section so they take
precedence
This is a work-in-progress.
Similar to the S2 Kaluga board, this provides the basic support for
showing pixels on the screen of the S3 Box. There is no support for
touch input yet, or any of the button peripherals. There is also a bug
somewhere that causes the printerdemo_mcu to raise an uncaught
exception. Only a content-reduced version of the printer demo shows on
the screen.
