editor: Add sticky scroll (#42242)

Closes #5344


https://github.com/user-attachments/assets/37ec58b0-7cf6-4eea-9b34-dccf03d3526b

Release Notes:

- Added a setting to stick scopes to the top of the editor

---------

Co-authored-by: KyleBarton <kjb@initialcapacity.io>
Co-authored-by: Conrad Irwin <conrad.irwin@gmail.com>

crates/language/src/language.rs

@@ -2613,6 +2613,9 @@ pub fn rust_lang() -> Arc<Language> {
         Some(tree_sitter_rust::LANGUAGE.into()),
     )
     .with_queries(LanguageQueries {
+        outline: Some(Cow::from(include_str!(
+            "../../languages/src/rust/outline.scm"
+        ))),
         indents: Some(Cow::from(
             r#"
 [