feat(nip-64): Display Chess (PGN) messages

[theborakompanioni]

In order for NIP-64 to be approved, it needs to be implemented in two clients.
Would Iris be interested in displaying kind := 64 as chess board in the web interface?

The spec is quite simple and straightforward–so it should be rather easy.
It would need to include a dependency on a library capable of drawing chess boards.
If you are interested, I'll try to come up with a PR. Please, let me know 🙏

[theborakompanioni]

Update: NIP-64 has been merged 💪