kern: eshop actually requires an extra mb

kern: fix comparison typo

kern: 21.0.0 requires an even smaller memory pool...

kern: fix debug build for [[nodiscard]] changes

ams: mark ams::Result [[nodiscard]] (partially complete). ...

NOTE: This work is not yet fully complete; kernel is done, but
it was taking an exceedingly long time to get through libstratosphere.
Thus, I've temporarily added -Wno-error=unused-result for libstratosphere/stratosphere.

All warnings should be fixed to do the same thing Nintendo does as relevant, but this
is taking a phenomenally long time and is not actually the most important work to do,
so it can be put off for some time to prioritize other tasks for 21.0.0 support.

kern: wait 100us after synchronizing cores before saving interrupt state on sleep

fs.mitm: add and use memlet module to temporarily steal applet memory while building romfs images. ...

Starting in 20.0.0, the browser needs more applet memory to function, so we can't steal as much any more.
Thus, we now steal 14 MB on 20.0.0+ instead of 40MB.

However, since this reduces memory available for custom system modules, we are adjusting to compensate.
ams.mitm's heap size has been reduced from 32MB to 12MB (recovering 20MB).
In addition, fs.mitm now uses a new mechanism for stealing memory from the applet pool while romfs is being built.

On net, we are compromising:
    * Custom sysmodules lose memory available to them.
        On 19.0.0/AMS 1.8.0, there was 30 MB available for custom sysmodules.
        Stealing 14 MB instead of 40 MB, we lose 26 MB of that. Reducing ams.mitm's usage will gain us back 20.
        Nintendo also appears to...use 4 extra MB, in 20.0.0, from my test homebrew.
        So on 20.0.0/AMS 1.9.0, there should be 20 MB available for custom sysmodules.
        On the bright side, on <20.0.0/AMS 1.9.0, I guess there will be 50 MB available for custom sysmodules now?
    * totk mods will lose the ability to...put every file in the romfs on sd card. There will be some unknown maximum filecount for totk mods.
        On the bright side, implementing the transient memory stealing should improve compatibility for some mods which strictly add files?

kern: invert meaning of KTargetSystem/KSystemControl bools

ams: various fixes to support booting debug configuration

kern: support reboot to fatal error on mariko

kern: move KTargetSystem into .rodata, split init/verify

kern: allocate all TTBR0 pages during init, use procidx as asid

kern: refactor smc helpers to share more common logic

kern: remove unnecessary fields from InitArgs (0x80 -> 0x40)

kern: track heap in KPageTableBase::MemoryRange

kern: 16.x web applet crashes on exit with 48 MB stolen (rip)

kern: better divide non-secure size, don't waste fatal memory unless necessary

kern: refactor init (kill identity map, merge cpu on logic)

kern: update KSystemControl::InitializePhase1, dynamically scale 39-bit address space regions

kern: adjust pool allocations

kern/pm: only steal 8 MB from applet. ...

WebApplet crashes on exit with 16 more MB stolen, apparently.

romfs: thank you fire emblem, very cool (closes #2021)

kern: move SecureAppletMemory/KPageBuffer heap into the ResourceRegion

kern: update for new device map semantics

kern: implement K(Secure)SystemResource

kern: update for new hw maintenance semantics

kern: enforce maximum secure region size

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

kern: fix vi devicename missing in HsSupported device list

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.