feat: include build script links in Rust bindings

This patch updates the Rust binding's build script to output [build
metadata][links].  This makes it easier for downstream crates to
determine the include path, in case they need to compile their own C
code that requires the tree-sitter headers.

[links]: https://doc.rust-lang.org/cargo/reference/build-scripts.html#the-links-manifest-key

lib/Cargo.toml

@@ -12,6 +12,7 @@ repository = "https://github.com/tree-sitter/tree-sitter"
 rust-version.workspace = true
 
 build = "binding_rust/build.rs"
+links = "tree-sitter"
 
 include = [
 	"/binding_rust/*",