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).

stratosphere/libstratosphere/source/pm/pm_dmnt_api.cpp

@@ -39,7 +39,7 @@ namespace sts::pm::dmnt {
         Event evt;
         R_TRY(pmdmntEnableDebugForApplication(&evt));
         *out_handle = evt.revent;
-        return ResultSuccess;
+        return ResultSuccess();
     }
 
     Result AtmosphereGetProcessInfo(Handle *out_handle, ncm::TitleLocation *out_loc, os::ProcessId process_id) {