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/supermaven_api/src/supermaven_api.rs

@@ -221,9 +221,7 @@ pub fn version_path(version: u64) -> PathBuf {
 }
 
 pub async fn has_version(version_path: &Path) -> bool {
-    fs::metadata(version_path)
-        .await
-        .map_or(false, |m| m.is_file())
+    fs::metadata(version_path).await.is_ok_and(|m| m.is_file())
 }
 
 pub async fn get_supermaven_agent_path(client: Arc<dyn HttpClient>) -> Result<PathBuf> {