Describe the solution you'd like
It seems like enums get generated in namespaces. eg.

exportnamespacePets{exportenumpet_type{Cat="Cat",Dog="Dog",}}

Namespaces are unnecessary at this point; in addition the TypeScript team has gone through efforts for performance improvements in their own code base by removing namespaces:microsoft/TypeScript#51387.

It would be nice to have an option to not generate namespaces.