[FEATURE] Upload to crates.io

[wetneb]

This grammar is currently used in difftastic, where it is vendored in the repository. It would be more convenient for us to use the grammar as an external dependency fetched from https://crates.io. Therefore it would be helpful for us if you could upload it there.

There are readily available CI workflows to help you publish your grammar to multiple package repositories: https://github.com/tree-sitter/workflows.

Thanks for your work on this grammar.