build(rust): vendor rnix parser crate

third_party/crates/rnix-0.14.0/Cargo.toml.orig

@@ -0,0 +1,20 @@
+[package]
+authors = ["jD91mZM2 <me@krake.one>"]
+description = "A Nix parser written in Rust"
+edition = "2021"
+license = "MIT"
+name = "rnix"
+readme = "README.md"
+repository = "https://github.com/nix-community/rnix-parser"
+version = "0.14.0"
+
+[[bench]]
+harness = false
+name = "all-packages"
+
+[dependencies]
+rowan = "0.16"
+
+[dev-dependencies]
+criterion = "0.8"
+expect-test = "1.5.1"