[FEATURE]: add Nix support #296

Feature Description

Add support for the Nix language. I guess that the tree-sitter queries can be copied or derived from https://github.com/nix-community/tree-sitter-nix/tree/master/queries

Use Case

Nix is a functional programming language used by NixOS and the Nix package/system manager. Currently some of its keyword are flagged as errors

Proposed Solution

add Nix tree-sitter queries, I guess

Alternative Solutions

No response

Examples

No response

Additional Context

No response