support liger kernel

Former-commit-id: 0f4e54abf6c5feb2329855a4047597ad5147720a

src/llamafactory/hparams/model_args.py

@@ -117,6 +117,10 @@ class ModelArguments:
         default=False,
         metadata={"help": "Whether or not to use unsloth's optimization for the LoRA training."},
     )
+    use_liger_kernel: bool = field(
+        default=False,
+        metadata={"help": "Whether or not to enable liger kernel for faster training."},
+    )
     visual_inputs: bool = field(
         default=False,
         metadata={"help": "Whethor or not to use multimodal LLM that accepts visual inputs."},