Microchip megaAVR 0-series interrupt facilities are defined in the
include/picolibrary/microchip/megaavr0/interrupt.h/source/picolibrary/microchip/megaavr0/interrupt.cc
header/source file pair.
The ::picolibrary::Microchip::megaAVR0::Interrupt::Controller class implements an
interrupt controller interface for interacting with the Microchip megaAVR 0-series global
interrupt enable.
See the ::picolibrary::Interrupt::Controller_Concept
documentation for
more information.