Vim9jit: A vim9script to Lua transpiler written in Rust

There's an intro video by the author showing how it works and explaining why it's necessary.

To cut a long story short it will allow neovim to continue sharing vim's upstream resources and encourage neovim users to contribute to vim, without needing to add vim9script to neovim.

https://youtu.be/zPQSST-M3fM