rust: bump tree-sitter to 0.25 and adopt LanguageFn pattern

The Rust binding was pinning tree-sitter = "~0.20.10", which only supports
parser ABI 13. The regenerated parser.c declares LANGUAGE_VERSION 15, so
loading the grammar at runtime panicked with `LanguageError { version: 15 }`
in the bindings test.

Switch to the modern convention used by tree-sitter-typescript and other
maintained parser crates:

- `tree-sitter-language = "0.1"` as the runtime dep (provides LanguageFn)
- `tree-sitter = "0.25"` as a dev-dep for the bindings test (supports ABI 15)
- `extern fn tree_sitter_glimmer_javascript() -> *const ()` returns the
  opaque language pointer; wrap with `LanguageFn::from_raw` and expose as
  `pub const LANGUAGE`
- doctest and unit test go through `parser.set_language(&LANGUAGE.into())`

Crate name, version, description, repository, edition, and include list are
left untouched so the published `tree-sitter-glimmer_javascript@0.0.1`
identifier is unaffected.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: NullVoxPopuli

Cargo.toml

@@ -20,7 +20,10 @@ include = [
 path = "bindings/rust/lib.rs"
 
 [dependencies]
-tree-sitter = "~0.20.10"
+tree-sitter-language = "0.1"
 
 [build-dependencies]
 cc = "1.0"
+
+[dev-dependencies]
+tree-sitter = "0.25"

bindings/rust/lib.rs

@@ -1,52 +1,47 @@
-//! This crate provides glimmer_javascript language support for the [tree-sitter][] parsing library.
+//! This crate provides Glimmer-flavored JavaScript language support for the
+//! [tree-sitter][] parsing library.
 //!
-//! Typically, you will use the [language][language func] function to add this language to a
+//! Typically, you will use the [LANGUAGE] constant to add this language to a
 //! tree-sitter [Parser][], and then use the parser to parse some code:
 //!
 //! ```
-//! let code = "";
-//! let mut parser = tree_sitter::Parser::new();
-//! parser.set_language(tree_sitter_glimmer_javascript::language()).expect("Error loading glimmer_javascript grammar");
+//! use tree_sitter::Parser;
+//!
+//! let code = "const x = 1;";
+//! let mut parser = Parser::new();
+//! parser
+//!     .set_language(&tree_sitter_glimmer_javascript::LANGUAGE.into())
+//!     .expect("Error loading glimmer_javascript parser");
 //! let tree = parser.parse(code, None).unwrap();
+//! assert!(!tree.root_node().has_error());
 //! ```
 //!
-//! [Language]: https://docs.rs/tree-sitter/*/tree_sitter/struct.Language.html
-//! [language func]: fn.language.html
 //! [Parser]: https://docs.rs/tree-sitter/*/tree_sitter/struct.Parser.html
 //! [tree-sitter]: https://tree-sitter.github.io/
 
-use tree_sitter::Language;
+use tree_sitter_language::LanguageFn;
 
 extern "C" {
-    fn tree_sitter_glimmer_javascript() -> Language;
+    fn tree_sitter_glimmer_javascript() -> *const ();
 }
 
-/// Get the tree-sitter [Language][] for this grammar.
+/// The tree-sitter [`LanguageFn`] for Glimmer-flavored JavaScript.
 ///
-/// [Language]: https://docs.rs/tree-sitter/*/tree_sitter/struct.Language.html
-pub fn language() -> Language {
-    unsafe { tree_sitter_glimmer_javascript() }
-}
+/// [LanguageFn]: https://docs.rs/tree-sitter-language/*/tree_sitter_language/struct.LanguageFn.html
+pub const LANGUAGE: LanguageFn = unsafe { LanguageFn::from_raw(tree_sitter_glimmer_javascript) };
 
 /// The content of the [`node-types.json`][] file for this grammar.
 ///
 /// [`node-types.json`]: https://tree-sitter.github.io/tree-sitter/using-parsers#static-node-types
-pub const NODE_TYPES: &'static str = include_str!("../../src/node-types.json");
-
-// Uncomment these to include any queries that this grammar contains
-
-// pub const HIGHLIGHTS_QUERY: &'static str = include_str!("../../queries/highlights.scm");
-// pub const INJECTIONS_QUERY: &'static str = include_str!("../../queries/injections.scm");
-// pub const LOCALS_QUERY: &'static str = include_str!("../../queries/locals.scm");
-// pub const TAGS_QUERY: &'static str = include_str!("../../queries/tags.scm");
+pub const NODE_TYPES: &str = include_str!("../../src/node-types.json");
 
 #[cfg(test)]
 mod tests {
     #[test]
     fn test_can_load_grammar() {
         let mut parser = tree_sitter::Parser::new();
         parser
-            .set_language(super::language())
+            .set_language(&super::LANGUAGE.into())
             .expect("Error loading glimmer_javascript language");
     }
 }