assistant: Partial fix for HTML entities in tools params (#32148)

This problem seems to be specific to Opus 4. Eval shows improvement from
89% to 97%.

Closes: https://github.com/zed-industries/zed/issues/32060

Release Notes:

- N/A

Co-authored-by: Ben Brandt <benjamin.j.brandt@gmail.com>

crates/eval/src/examples/mod.rs

@@ -16,6 +16,7 @@ mod add_arg_to_trait_method;
 mod code_block_citations;
 mod comment_translation;
 mod file_search;
+mod grep_params_escapement;
 mod overwrite_file;
 mod planets;
 
@@ -27,6 +28,7 @@ pub fn all(examples_dir: &Path) -> Vec<Rc<dyn Example>> {
         Rc::new(planets::Planets),
         Rc::new(comment_translation::CommentTranslation),
         Rc::new(overwrite_file::FileOverwriteExample),
+        Rc::new(grep_params_escapement::GrepParamsEscapementExample),
     ];
 
     for example_path in list_declarative_examples(examples_dir).unwrap() {