Enable colour help for Python 3.14 (#252)

Author: hugovk

src/norwegianblue/cli.py

@@ -31,7 +31,8 @@ def main() -> None:
     parser = argparse.ArgumentParser(
         description=__doc__, formatter_class=argparse.RawDescriptionHelpFormatter
     )
-    # Added in Python 3.14
+    # Both added in Python 3.14
+    parser.color = "yes"
     parser.suggest_on_error = True
     parser.add_argument(
         "product",