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

util: fix consteval CountTrailingZeroes impl

ams: bump api verrsion pre-emptively to 1.2.0

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

svc: use m_ for member variables

sdmmc: use m_ for member variables

kern: fix some lingering non-m_ member variables

exo/vapours: refactor member variables to m_ over this->

libstrat: remove lingering debugging edits

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

settings: fix correctness issue in LazyFileAccessor

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

kern: tidy up capability calc

git subrepo push libraries ...

subrepo:
  subdir:   "libraries"
  merged:   "0a4c2759a"
upstream:
  origin:   "https://github.com/Atmosphere-NX/Atmosphere-libs"
  branch:   "master"
  commit:   "0a4c2759a"
git-subrepo:
  version:  "0.4.1"
  origin:   "???"
  commit:   "???"

os: fix mutex push/pop prototypes

git subrepo push libraries ...

subrepo:
  subdir:   "libraries"
  merged:   "80d72af9f"
upstream:
  origin:   "https://github.com/Atmosphere-NX/Atmosphere-libs"
  branch:   "master"
  commit:   "80d72af9f"
git-subrepo:
  version:  "0.4.1"
  origin:   "???"
  commit:   "???"

cs: prevent exceptions from manifesting

boot: save 12KB

erpt: save 8KB

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.