add basic tests for os::Event/SystemEvent functionality

ams: support building unit test programs on windows/linux/macos

erpt: add automatic report cleanup mechanism on boot (closes #1795)

KThreadContext: Use El0PsrMask constant in GetUserContext

ams_mitm: update to use new NcaFileSystemDriver intf

crypto: fix asm constraints for memory comparison

fix SubStorage copy ctor/= op for new shared_ptr member

fs: add Sha256HashGenerator, LZ4 decompressor

fs: remove now unused StorageOption

fs: revise NcaFileSystemDriver for latest semantics

fssystem: revise allocator logic for latest semantics

fssrv: flesh out the program registry

fssrv: skeleton more program registry logic

fssrv: add skeleton getters for service object sf::SharedPointers

fs: allocations with mutex held must be unsafe

fs: implement newer allocator templates

fssrv: skeleton server manager setup/registration

fssrv: add placeholder for ipc interface

fs: add skeleton dir for sysmodule code ...

Please note this isn't likely to immediately be the active ams project.

kern: fix syntax in audit statement

lib: add missing semicolon

build: remove unnecessary g-dwarf4 flags

Integrate new result macros. (#1780) ...

* result: try out some experimental shenanigans

* result: sketch out some more shenanigans

* result: see what it looks like to convert kernel to use result conds instead of guards

* make rest of kernel use experimental new macro-ing

typofix: boogaloo: electric.

fix typo-bug in HierarchicalSha256Storage::Read

git subrepo push libraries ...

subrepo:
  subdir:   "libraries"
  merged:   "0d161b858"
upstream:
  origin:   "https://github.com/Atmosphere-NX/Atmosphere-libs"
  branch:   "master"
  commit:   "0d161b858"
git-subrepo:
  version:  "0.4.1"
  origin:   "???"
  commit:   "???"

ams: first attempt at 13.2.1 support

kern: add missing debug mode check to WriteDebugProcessMemory

ams: deduplicate static initialization logic

kern: fix vi devicename missing in HsSupported device list