Add -a flag to ls to show hidden files

Author: zohrehKazemianpour

implement-shell-tools/ls/ls.py

@@ -8,13 +8,17 @@
 )
 
 parser.add_argument("-1", dest="one_column", action="store_true", help="List one file per line")
+parser.add_argument("-a", "--all", action="store_true", help="Include hidden files")
 parser.add_argument("path", nargs='?', default=".", help="Directory to list (default: current directory)")
 
 args = parser.parse_args()
 
 # List directory contents
 files = os.listdir(args.path)
 
-# Print each file
+# Filter out hidden files unless -a flag is used
+if not args.all:
+    files = [f for f in files if not f.startswith('.')]
+
 for file in files:
     print(file)