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/updater/updater_bis_management.hpp

@@ -149,7 +149,7 @@ namespace sts::updater {
                 R_TRY(BisAccessor::Read(dst, entry->size, entry->offset));
 
                 *out_size = entry->size;
-                return ResultSuccess;
+                return ResultSuccess();
             }
 
             Result Write(const void *src, size_t size, EnumType which) {