12.05.2024 v2:
bunch of more data types (including nbt), gets stuck sending a few packets, so we have to skip, but parses many https://pastes.dev/o4m7RvxH7Q
19.05.2024:
fixed sending, we now spawn properly, most packets can get parsed, joining in any modern version works https://pastes.dev/XkoMh81kB6 (1.16.5 join)