Add high level CPU interrupts for ESP32-S3 direct-boot

[bjoernQ]

This fixes #236 but doesn't contain any modification of the CI workflow to check the direct-boot feature

[MabezDev]

Is this because we don't use the xtensa-lx-rt linker script in direct boot mode? I ask because we already have the definitions in there: https://github.com/esp-rs/xtensa-lx-rt/blob/654c9302a4f2c615cc5e19a226a39b597f25eadd/exception-esp32.x.jinja#L16-L23

[bjoernQ]

Is this because we don't use the xtensa-lx-rt linker script in direct boot mode? I ask because we already have the definitions in there: https://github.com/esp-rs/xtensa-lx-rt/blob/654c9302a4f2c615cc5e19a226a39b597f25eadd/exception-esp32.x.jinja#L16-L23

Yes, for direct-boot we can't use the xtensa-lx-rt linker script as far as I remember and need to duplicate most of it here

[MabezDev]

Gotcha! In which case, this looks good to me :)

[jessebraham]

Thanks for fixing this, I can get the CI updated this week most likely to try and avoid this in the future.