feat: improve ls command output formatting

src/builtins/ls.rs

@@ -18,6 +18,11 @@ impl Builtin for Ls {
 
         //for entry in entries.by_ref().into_iter() {}
 
+        println!(
+            "{} | dir  | size   | modified   |",
+            right_padding(" filename", 20)
+        );
+
         for entry in entries {
             let Ok(entry) = entry else {
                 eprintln!("Couldn't get directory entry");
@@ -83,11 +88,11 @@ fn format_line(
     modified: DateTime<Local>,
 ) -> String {
     format!(
-        "{} | {:4} | {:6} | {}",
+        "{} | {:4} | {:6} | {} |",
         right_padding(file_name, max_name_len),
         file_type,
         format_filesize(file_size),
-        format_date(modified)
+        right_padding(&format_date(modified), 10)
     )
 }