unit testing: catch -> doctest (faster compile, thread-safe)

sm/tipc: ensure technical-correctness of sins (no page cost)

sm: save 0x5000 of memory by sinning

Minor header fixes to reduce parsing issues with Clang (#1700) ...

* Work around Clang's incomplete C++20 support for omitting typename

* vapours: fix Clang error about missing return in constexpr function

* stratosphere: fix call to non-constexpr strlen in constexpr function

strlen being constexpr is a non-compliant GCC extension; Clang
explicitly rejects it: https://reviews.llvm.org/D23692

* stratosphere: add a bunch of missing override specifiers

* stratosphere: work around Clang consteval bug

Minimal example: https://godbolt.org/z/MoM64v93M

The issue seems to be that Clang does not consider f(x) to be a
constant expression if x comes from a template argument that isn't
a non-type auto template argument (???)

We can work around this by relaxing GetMessageHeaderForCheck (by using
constexpr instead of consteval). This produces no functional changes
because the result of GetMessageHeaderForCheck() is assigned to a
constexpr variable, so the result is guaranteed to be computed
at compile-time.

* stratosphere: fix missing require clauses in definitions

GCC not requiring the require clauses to be repeated for member
definitions is actually a compiler bug:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96830

Clang rejects declarations with missing require clauses.

* Fix ALWAYS_INLINE_LAMBDA and parameter list relative order

While GCC doesn't seem to care about the position of the always_inline
attribute relative to the parameter list, Clang is very picky
and requires the attribute to appear after the parameter list
(and before a trailing return type)

* stratosphere: fix static constexpr member variable with incomplete type

GCC accepts this for some reason (because of the lambda?) but Clang
correctly rejects this.

KScheduler big brain strat for mdscr_el1 cfg change

git subrepo push libraries ...

subrepo:
  subdir:   "libraries"
  merged:   "ff2883361"
upstream:
  origin:   "https://github.com/Atmosphere-NX/Atmosphere-libs"
  branch:   "master"
  commit:   "ff2883361"
git-subrepo:
  version:  "0.4.1"
  origin:   "???"
  commit:   "???"

ams: overhaul fs.mitm romfs ownership, bump to 1.2.4

docs: add changelog for 1.2.3

git subrepo push libraries ...

subrepo:
  subdir:   "libraries"
  merged:   "e7b84767c"
upstream:
  origin:   "https://github.com/Atmosphere-NX/Atmosphere-libs"
  branch:   "master"
  commit:   "e7b84767c"
git-subrepo:
  version:  "0.4.1"
  origin:   "???"
  commit:   "???"

git subrepo pull (merge) libraries ...

subrepo:
  subdir:   "libraries"
  merged:   "8764bd406"
upstream:
  origin:   "https://github.com/Atmosphere-NX/Atmosphere-libs"
  branch:   "master"
  commit:   "12d0ba172"
git-subrepo:
  version:  "0.4.1"
  origin:   "???"
  commit:   "???"

ams: bump api version to 1.2.3

dmnt2: fix gdb register output

creport: fix errant )

dmnt2: try to avoid writing out of bounds when generating packets

dmnt2: fix module name detection, add auto-break on hb nro launch

dmnt2: fix missing null-terminator for invalid command error

dmnt2: detect thread name, add monitor get mapping(s), increase buffer sizes

dmnt2: remove memory-map output which does nothing for us

kern/dmnt2: allow retrieval of process info via extension ...

This also fixes ctrl-c break in gdbstub, and fixes crash on unknown monitor cmd.

dmnt2: first pass at wait-for-application

dmnt2: add monitor get base, TODO responses for monitor wait *

dmnt2: add memory-map read, improve module shared-lib names

Adding setting usage to dmnt2 means dmnt2 needs settings access

dmnt: enable experimental standalone usage of gdbstub, while starlink is in dev

ams.mitm: more romfs building space/time tradeoffs. ...

This is needed for Animal Crossing 2.0.0, which has >99000 fucking files.

We now do several passes over dir/file tables instead of one pass,
doing entire hash tables before we touch dir/file tables. Thus we
no longer need to simultaneously allocate hash table and dir/file table space.

In addition, we now do repeated passes building a segment of hash tables
at a time, when insufficient memory is available. Similar is also now the
case for file/dir tables, we try 0x40000 work buffer and divide by 2
until we successfully alloc. We don't allow a work buffer <0x4000, for
write/perf reasons. If a game triggers that, let me know I guess.

Hard to imagine a worse torture-test for this code than animal crossing.

ams: add arm/armv8a to gitignore

ams: update for awareness of architecture revision

creport: print symbols if they're present

git subrepo push libraries ...

subrepo:
  subdir:   "libraries"
  merged:   "ceff2f371"
upstream:
  origin:   "https://github.com/Atmosphere-NX/Atmosphere-libs"
  branch:   "master"
  commit:   "ceff2f371"
git-subrepo:
  version:  "0.4.1"
  origin:   "???"
  commit:   "???"

spl: fix legacy physical keyslot compatibility