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_icons/src/file_icons.rs

@@ -72,7 +72,7 @@ impl FileIcons {
                 return maybe_path;
             }
         }
-        return this.get_icon_for_type("default", cx);
+        this.get_icon_for_type("default", cx)
     }
 
     fn default_icon_theme(cx: &App) -> Option<Arc<IconTheme>> {