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", action="store_true")
 
     # Directory mode
     parser.add_argument("--input-dir", help="Input directory")
@@ -49,13 +50,20 @@ def main():
 
     parser.add_argument(
         "-t", "--type",
-        required=True,
+        required=False,
         choices=["ring", "counting"],
         help="Type of table to process"
     )
 
     args = parser.parse_args()
 
+    if args.v:
+        print("1.0")
+        return
+    if not args.type:
+        parser.error("The --type argument is required.")
+        retur
+
     # directory
     if args.input_dir and args.output_dir:
         logger.info("Running in directory mode")