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/hid/hid_api.cpp

@@ -47,7 +47,7 @@ namespace sts::hid {
                 g_initialized_hid = true;
             }
 
-            return ResultSuccess;
+            return ResultSuccess();
         }
 
     }
@@ -64,7 +64,7 @@ namespace sts::hid {
             *out |= hidKeysHeld(static_cast<HidControllerID>(controller));
         }
 
-        return ResultSuccess;
+        return ResultSuccess();
     }
 
 }