Fix a bunch of other low-hanging style lints (#36498)

- **Fix a bunch of low hanging style lints like unnecessary-return**
- **Fix single worktree violation**
- **And the rest**

Release Notes:

- N/A

extensions/html/src/html.rs

@@ -13,7 +13,7 @@ struct HtmlExtension {
 
 impl HtmlExtension {
     fn server_exists(&self) -> bool {
-        fs::metadata(SERVER_PATH).map_or(false, |stat| stat.is_file())
+        fs::metadata(SERVER_PATH).is_ok_and(|stat| stat.is_file())
     }
 
     fn server_script_path(&mut self, language_server_id: &LanguageServerId) -> Result<String> {