added version tag

fledermaus_formatter/main.py

@@ -42,6 +42,7 @@ def main():
     # Single file mode (optional fallback)
     parser.add_argument("-i", "--input", help="Input Excel file")
     parser.add_argument("-o", "--output", help="Output Excel file")
+    parser.add_argument("-v", help="Version")
 
     # Directory mode
     parser.add_argument("--input-dir", help="Input directory")
@@ -56,6 +57,10 @@ def main():
 
     args = parser.parse_args()
 
+    if args.v:
+        print("1.0")
+        return
+
     # directory
     if args.input_dir and args.output_dir:
         logger.info("Running in directory mode")