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/gpui/src/platform/mac/text_system.rs

@@ -319,7 +319,7 @@ impl MacTextSystemState {
     fn is_emoji(&self, font_id: FontId) -> bool {
         self.postscript_names_by_font_id
             .get(&font_id)
-            .map_or(false, |postscript_name| {
+            .is_some_and(|postscript_name| {
                 postscript_name == "AppleColorEmoji" || postscript_name == ".AppleColorEmojiUI"
             })
     }