kern/test: add wip qemu-virt board support to mesosphere

ams: improve offsetof style consistency

constexpr: resign ourselves to gcc dropping void -> T support

tipc: implement special-case templating used by 13.0.0 pgl

tipc: enable named-thread dispatch

boot: update for 13.0.0/aula parameter changes (closes #1477)

powctl: integrate 13.0.0 changes (aula params not done yet)

strat: fix some mitm server management logic

tipc/sm: update more fully for 13.0.0 changes

tipc: add additional logic from 13.0.0

sm/tipc: minor cleanup

sf: prevent emitting mitm/defer code unless server in process supports it

ams: allow bootloader to merely approximate correct target firmware

loader: refactor to remove fake namespaces

loader: refactor ro manager/improve accuracy

spl: refactor for accuracy/move into libstrat

os: add FlushDataCache

strat: use m_ for member variables

ams: replace most remaining operator & with std::addressof

strat: refactor address taking of form &var[...]

strat: always use explicit result namespacing

settings: implement KeyValueStore (#1659) ...

* settings: implement KeyValueStore and dependencies

* settings: update KeyValueStore for recent refactoring

* settings: address feedback

strat: use ams::Main() instead of main(argc, argv)

strat: build sysmodules with -Wextra/-Werror

libstrat: fix compilation without pre-compiled header/without lto

libstrat: enable -Wextra, -Werror ...

This caught an embarrassingly large number of bugs.

strat: remove map namespace, svc: add address space defs

strat: use sf::NativeHandle for ipc templating

sf: add NativeHandle type ...

TODO: figure out how to integrate this into templating...

strat: prefer os::NativeHandle to Handle/svc::Handle where sensible