stop overriding user config on update

ams_mitm: Implement system settings mitm

ams_mitm: Implement set:sys firmwareversion mitm

Implement set_mitm

ams_mitm: implement hid mitm

hbl: support different keys for any-app vs specific ...

This also makes the default configuration:

To override a generic app, hold R.
To override album, do not hold R.

mitm/cfg: pass around override status for decision-making

strat: update for latest libnx.

ams_mitm: begin skeleton refactor

sf: fixes (basic mitm service functionality now confirmed working)

libstrat: implement mitm server registration

strat: TitleId -> ProgramId, titles->contents

strat: fixes for compat with latest libnx

strat: split out common functionality for future meso use

namespace sts -> namespace ams ...

namespace sts::ams -> ams::exosphere, ams::.

This is to facilitate future use of ams:: namespace code in
mesosphere, as we'll want to include ams::util, ams::result, ams::svc...

Results: Implement namespaced, type-safe results. ...

Because I was working on multiple things at once, this commit also:
- Adds wrappers for/linker flags to wrap CXX exceptions to make them
  abort. This saves ~0x8000 of memory in every system module.
- Broadly replaces lines of the pattern if (cond) { return ResultX; }
  with R_UNLESS(!cond, ResultX());.
- Reworks the R_TRY_CATCH macros (and the result macros in general).

libstrat: fix domain issues. in/out objects now work.

sf: implement mitm forwarding + domains.

libstrat: namespace remaining non-namespaced code. more new-ipc updates

boot2: move to separate process

pm: update for new-ipc

sf: implement CopyFromCurrentDomain

hipc: begin implementing domains. fixes ro + sm together

new-ipc: implement deferral. sm now works.

sf: implement service framework enough for ro to work. ...

This completely re-does the whole interface for ipc servers.

libstrat: update for latest libnx, delete ipc in prep for rewrite

sts: add STS_UNREACHABLE_DEFAULT_CASE()

os: implement waitable management. ...

This implements waitable management for Events (and
implements Events). It also refactors PM to use new
Event/Waitable semantics, and also adds STS_ASSERT
as a macro for asserting a boolean expression. The
rest of stratosphere has been refactored to use
STS_ASSERT whenever possible.

libstrat: namespace hossynch.hpp

dmnt: refactor to use sts:: namespace.