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

crates/file_finder/src/open_path_prompt.rs

@@ -728,7 +728,7 @@ impl PickerDelegate for OpenPathDelegate {
                         .child(LabelLike::new().child(label_with_highlights)),
                 )
             }
-            DirectoryState::None { .. } => return None,
+            DirectoryState::None { .. } => None,
         }
     }