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/fatal/source/fatal_task_power.cpp

@@ -178,18 +178,18 @@ namespace sts::fatal::srv {
 
         Result PowerControlTask::Run() {
             this->MonitorBatteryState();
-            return ResultSuccess;
+            return ResultSuccess();
         }
 
         Result PowerButtonObserveTask::Run() {
             this->WaitForPowerButton();
-            return ResultSuccess;
+            return ResultSuccess();
         }
 
         Result StateTransitionStopTask::Run() {
             /* Nintendo ignores the output of this call... */
             spsmPutErrorState();
-            return ResultSuccess;
+            return ResultSuccess();
         }
 
     }