refactoring: use let else instead of match

src/builtins/ls.rs

@@ -16,12 +16,9 @@ impl Builtin for Ls {
         //for entry in entries.by_ref().into_iter() {}
 
         for entry in entries {
-            let entry = match entry {
-                Ok(e) => e,
-                Err(_) => {
-                    println!("Couldn't get directory entry");
+            let Ok(entry) = entry else {
+                eprintln!("Couldn't get directory entry");
                 continue;
-                }
             };
             let file_name = entry.file_name().to_string_lossy().to_string();
             let mut file_type = "unknown";