Allow setting system save owner to 0 for now

src/LibHac/FsService/FileSystemProxy.cs

@@ -444,8 +444,8 @@ namespace LibHac.FsService
 
             if (createInfo.OwnerId == TitleId.Zero)
             {
-                // Assign the current program's ID
-                throw new NotImplementedException();
+                // todo: Assign the current program's ID
+                // throw new NotImplementedException();
             }
 
             // Missing permission checks

src/hactoolnet/ResultLog.cs

@@ -32,7 +32,7 @@ namespace hactoolnet
                     method.Name.StartsWith(nameof(IFileSystem.GetEntryType)) ||
                     method.Name.StartsWith(nameof(IAttributeFileSystem.GetFileAttributes)))
                 {
-                   // return;
+                    return;
                 }
 
                 string methodName = $"{method.DeclaringType?.FullName}.{method.Name}";