chore: Fix most compiler warnings (or disable them for vendor code)

bootloader/main.c

epicardium/api/genapi.py

hw-tests/bmetest/main.c

hw-tests/dual-core/core1.c

hw-tests/ecgtest/main.c

hw-tests/hello-freertos/CLI-commands.c

hw-tests/hello-freertos/main.c

hw-tests/hello-world/main.c

hw-tests/imutest/main.c

lib/card10/card10.c

lib/gfx/display.c

lib/micropython/gen-version.sh

lib/sdk/Libraries/MAX32665PeriphDriver/meson.build

lib/sdk/Libraries/MAXUSB/meson.build

lib/vendor/Bosch/BHy1/meson.build

lib/vendor/Maxim/MAX86150/meson.build