Thanks for building this. I had not heard of it before, but it looks great Are there more tutorials elsewhere on the Internet you would recommned, besides what is in the documentation?
In the near future, we'll create some more GitHub-specific documentation that walks you through how to add advanced language support for any programming language on GitHub, by writing a Tree-sitter grammar, and then by writing the tree queries that are used for syntax highlighting, simple code navigation, and someday soon... precise code navigation.