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/boot/source/i2c/driver/i2c_api.cpp

@@ -40,7 +40,7 @@ namespace sts::i2c::driver {
             R_TRY(Send(session, *cur_cmd, num_bytes, option));
             (*cur_cmd) += num_bytes;
 
-            return ResultSuccess;
+            return ResultSuccess();
         }
 
         Result ReceiveHandler(const u8 **cur_cmd, u8 **cur_dst, Session& session) {
@@ -55,7 +55,7 @@ namespace sts::i2c::driver {
             R_TRY(Receive(session, *cur_dst, num_bytes, option));
             (*cur_dst) += num_bytes;
 
-            return ResultSuccess;
+            return ResultSuccess();
         }
 
         Result SubCommandHandler(const u8 **cur_cmd, u8 **cur_dst, Session& session) {
@@ -72,7 +72,7 @@ namespace sts::i2c::driver {
                     break;
                 STS_UNREACHABLE_DEFAULT_CASE();
             }
-            return ResultSuccess;
+            return ResultSuccess();
         }
 
         /* Command handler list. */
@@ -155,7 +155,7 @@ namespace sts::i2c::driver {
             R_TRY(g_cmd_handlers[static_cast<size_t>(cmd)](&cur_cmd, &cur_dst, session));
         }
 
-        return ResultSuccess;
+        return ResultSuccess();
     }
 
     /* Power management. */