fix: pass `args.output_path` to `compose_lora` when called via command line (#364)

* Add missing `save_file` call for use of composed.py via command line

* use `output_path` functionality of `compose_lora` instead

nunchaku/lora/flux/compose.py

@@ -136,4 +136,4 @@ if __name__ == "__main__":
     parser.add_argument("-o", "--output-path", type=str, required=True, help="path to the output safetensors file")
     args = parser.parse_args()
     assert len(args.input_paths) == len(args.strengths)
-    composed = compose_lora(list(zip(args.input_paths, args.strengths)))
+    compose_lora(list(zip(args.input_paths, args.strengths)), args.output_path)