fs: implement PooledBuffer

fs: implement system heap

git subrepo push libraries ...

subrepo:
  subdir:   "libraries"
  merged:   "18396d1a"
upstream:
  origin:   "https://github.com/Atmosphere-NX/Atmosphere-libs"
  branch:   "master"
  commit:   "18396d1a"
git-subrepo:
  version:  "0.4.1"
  origin:   "???"
  commit:   "???"

crypto: add aes (ecb, ctr, xts)

fssystem: add RomFsFileSystem

NCM client implementation (#858) ...

* ncm: Implement InstallTaskDataBase and FileInstallTaskData

* ncm: minor bugfixes

* ncm: Implemented MemoryInstallTaskData

* ncm: more std

* ncm: begin implementing install task base

* ncm: move protected funcs

* ncm: fix recursive include

* ncm: more install task progress

* ncm install task: implement IncrementProgress and update UpdateThroughputMeasurement

* ncm: more work

* ncm client: more progress

* ncm client: more progress

* ncm client: finish implementing GetContentMetaInfoList

* ncm client: more progress

* ncm client: finished InstallTaskBase

* ncm client: implement PackageInstallTaskBase

* ncm client: fixes

* ncm: improve accuracy

* ncm client: implement PackageInstallTask

* ncm client: implement PackageSystemUpdateTask

* ncm client: minor name tweaks

* ncm client: implement SubmissionPackageInstallTask

* ncm client: add missing this to SubmissionPackageInstallTask

* ncm client: add missing nullptr check to SubmissionPackageInstallTask destructor

* ncm client: SubmissionPackageInstallTask fixes

* ncm: fix forward declarations

* ncm client: added simplified funcs

* ncm: cleanup client code

* ncm: fix bug introduced by cleanup

* ncm: fix typo

* ncm: implement correct ReadVariationContentMetaInfoList behavior

* ncm: correct InstallContentMetaWriter ctor

* ncm: correct conversion of content meta header types

Co-authored-by: Michael Scire <SciresM@gmail.com>

git subrepo push libraries ...

subrepo:
  subdir:   "libraries"
  merged:   "62f5667b"
upstream:
  origin:   "https://github.com/Atmosphere-NX/Atmosphere-libs"
  branch:   "master"
  commit:   "62f5667b"
git-subrepo:
  version:  "0.4.1"
  origin:   "???"
  commit:   "???"

sf: fix OutArray/InArray constructors to behave as expected

git subrepo push libraries ...

subrepo:
  subdir:   "libraries"
  merged:   "0f46474d"
upstream:
  origin:   "https://github.com/Atmosphere-NX/Atmosphere-libs"
  branch:   "master"
  commit:   "0f46474d"
git-subrepo:
  version:  "0.4.1"
  origin:   "???"
  commit:   "???"

fs: add an extension common name generator for sd card

nim: add DestroySystemUpdateTask/ListSystemUpdateTask (#863)

git subrepo push libraries ...

subrepo:
  subdir:   "libraries"
  merged:   "de221b5d"
upstream:
  origin:   "https://github.com/Atmosphere-NX/Atmosphere-libs"
  branch:   "master"
  commit:   "de221b5d"
git-subrepo:
  version:  "0.4.1"
  origin:   "???"
  commit:   "???"

fix CONCATENATE

git subrepo push libraries ...

subrepo:
  subdir:   "libraries"
  merged:   "63d5df84"
upstream:
  origin:   "https://github.com/Atmosphere-NX/Atmosphere-libs"
  branch:   "master"
  commit:   "63d5df84"
git-subrepo:
  version:  "0.4.1"
  origin:   "???"
  commit:   "???"

updater: improve api

KPageHeap: Fix a typo in initialization block alignment. (#862)

lmem: fix memory block header placement error

ncm: use static memory pools for different allocations

stratosphere: fix building with latest libnx

mem: implement most of StandardAllocator (#860) ...

This was tested using `https://github.com/node-dot-cpp/alloc-test` plus a few other by-hand tests.

It seems to work for the case we care about (sysmodules without thread cache-ing).

External users are advised to build with assertions on and contact SciresM if you find issues.

This is a lot of code to have gotten right in one go, and it was written mostly after midnight while sick, so there are probably un-noticed issues.

git subrepo push libraries ...

subrepo:
  subdir:   "libraries"
  merged:   "6f77a6bf"
upstream:
  origin:   "https://github.com/Atmosphere-NX/Atmosphere-libs"
  branch:   "master"
  commit:   "6f77a6bf"
git-subrepo:
  version:  "0.4.1"
  origin:   "???"
  commit:   "???"

fs: add MountImageDirectory

fs: implement FileHandleStorage (#857) ...

* fs: implement FileHandleStorage

* fs: merge FileHandleStorage into file_storage TU

Co-authored-by: Michael Scire <SciresM@gmail.com>

fssystem: Implement PartitionFileSystemCore (#856) ...

* fssystem: implement PartitionFileSystemMetaCore

* fssystem: PartitionFileSystemMetaCore cleanup

* fs: add IFile::DryWrite, update results

* fssystem: implement PartitionFileSystemCore

* fssystem: cleanup PartitionFileSystemCore

* fssystem: implement Sha256PartitionFileSystem

Co-authored-by: Michael Scire <SciresM@gmail.com>

fs.mitm: use new namespace types for saves

git subrepo push libraries ...

subrepo:
  subdir:   "libraries"
  merged:   "30f3e4c3"
upstream:
  origin:   "https://github.com/Atmosphere-NX/Atmosphere-libs"
  branch:   "master"
  commit:   "30f3e4c3"
git-subrepo:
  version:  "0.4.1"
  origin:   "???"
  commit:   "???"

Add Span<T>.

fs: fix bugs with external code filesystems

git subrepo push libraries ...

subrepo:
  subdir:   "libraries"
  merged:   "07630f73"
upstream:
  origin:   "https://github.com/Atmosphere-NX/Atmosphere-libs"
  branch:   "master"
  commit:   "07630f73"
git-subrepo:
  version:  "0.4.1"
  origin:   "???"
  commit:   "???"

fs: add MountDeviceSaveData