os: implement ExpandUnsignedValueToAscii ...

Nintendo does this as of latest firmware.

It's desirable because it removes the only usage of util::SNPrintf() from os library,
which means programs which don't otherwise use SNPrintf do not need to link it into .text.

This saves ~0xD40 of .text as of time-of-commit when successfully unlinking, and e.g.
reduces our sm (and other modules) memory size by a page.

os: implement LightSemaphore

os: implement LightMessageQueue

os: refactor MessageQueue to use new MessageQueueHelper template

os: tweak LightEvent codegen

os: implement LightEvent

os: implement ReadWriteBusyMutex

os: implement BusyMutex

ncm: fix destructor availability

svc/kern/dd: remove MapDeviceAddressSpace()

ncm: updated to 13.0.0

ncm: skeleton new commands

sprofile: fully reimplement sprof:bg + sprof:sp

sprofile: implement non-importer bgagent commands

sprofile: implement OpenProfileUpdateObserver

erpt: skeleton sprofile apis

fusee/exo: update for recognition of 13.0.0

boot2: launch nintendo lm from built in system, not none

cs: fix launching of tio server

cs: fix screenshot packet semantics

cs: implement TakeScreenShot command

cs: fix allocator aborts

osdbg: implement thread info api

fix dmnt.gen2 title id (not sure how I typo'd this)

boot2: launch dmnt.gen2 over dmnt, when using htc

cs: implement GetFirmwareVersion command

scs: implement EventHandlerThread for shell

scs: implement DoShellServer

LogManager: implement system module, client api, logging api (#1617) ...

Some notes:

* Unless `atmosphere!enable_log_manager` is true, Nintendo's log manager will be used instead.
  * This prevents paying memory costs for LM when not enabling logging.
  * To facilitate this, Atmosphere's log manager has a different program id from Nintendo's.
  * `atmosphere!enable_htc` implies `atmosphere!enable_log_manager`.
* LogManager logs to tma, and the SD card (if `lm!enable_sd_card_logging` is true, which it is by default).
* Binary logs are saved to `lm!sd_card_log_output_directory`, which is `atmosphere/binlogs` by default.

fusee: attempt reboot to self if possible, better abort/fatal handlers