erpt: update IDs for 20.1.0

Add version enums for 20.1.0

ams: basic support for compiling with gcc 15

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?

ams: add enum support for 20.0.1/18.0.1

erpt: initial support (incomplete) for 20.0.0

ldr/pm: update for 20.0.0 abi changes

strat: update for fsp-ldr 20.0.0 changes

ncm: update to implement new ContentMetaDatabase function for 20.0.0

erpt: update ids for 20.0.0

fusee/exo/ams: update with new keydata/version enums

ams: various fixes to support booting debug configuration

strat: ldr::PlatformId -> ncm::ContentMetaPlatform

ldr: ProgramInfo is 0x410 now, and fix debug flags for hbl

pm: add new 19.0.0 commands ...

This is functionally correct, but I have no idea what these are meant to represent.
These functions are completely unused on NX.

ns_mitm: update to support new 19.0.0 command

ro: support NROs with read-only first page

kern/ldr: add support for --x executables

kern/svc: update WaitForAddress to support 64-bit WaitIfEqual

erpt: add new IDs/categories

ams: bump to 1.7.1 (support for 18.1.0)

libstrat: fix more gnu++23 errors

loader: update to reflect latest 18.0.0 changes ...

well, this sure is late, whoops

spl: add support for new spl:es command 33

erpt: actually support non-sequential ids, nintendo why

erpt: add new IDs/categories

fusee/exo/ams: update with new keydata/version enums

settings: support PortugueseBr (closes #2264)

sf: fix ipc serialization bug (out object id offsets)

kern/svc: fix query/insecure names