Add multithread support

[zjkmxy]

Python 3.13 has an option to disable GIL which allows free-threaded execution.
Is it possible or beneficial to add multithreading support to python-ndn?

[yoursunny]

Is it possible to add multithreading support?

1. Make a list of all your dependencies.
2. If they already support multi-threading, put a checkmark.
3. If they don't, create an issue in their issue tracker requesting multi-threading feature (if such issue doesn't already exist), and link to that issue from there.