Add support for Civet language

[AustinGrey]

Language name

Civet

URL of example repository

https://github.com/edemaine/texlish

URL of syntax highlighting grammar

https://github.com/DanielXMoore/Civet/blob/df3ed3d6e36c2f031e90554df084ffc2f359c92e/lsp/tree-sitter/README.md

Most popular extensions

• .civet

Detected language

I think these are getting detected as javascript right now

[AustinGrey]

The repository linked does contain representative samples, as well as TemRevil's PR #8063 . I don't see how emitted JS or TS could inflate statistics. ".civet" files are immediately and obviously distinct from ".ts" or ".js" files. So there is no ambiguity. I haven't yet encountered a Civet repo that tries to emit JS by it's sources and also commits that. Generally the workflow is like typescript, where the results are built directly into a dist folder for distribution rather than transpiled beside for compilation.

Does the linked tree-sitter repository expose a compatible TextMate grammar, or will a separate highlighting source be needed?

It does, which TemRevil's PR has made use of