1. fix trainer.py 的错误，补充 self._config = trainer_cfg 防止报错

2. gitignore 加上 ckpt

Author: Drasick

.gitignore

@@ -136,3 +136,5 @@ GroupedGEMM/
 
 xtuner_train/
 
+
+ckpt

xtuner/v1/train/trainer.py

@@ -481,6 +481,8 @@ def __init__(
         hooks_config: HooksConfig = HooksConfig(),
         internal_metrics_cfg: InternalMetricsConfig | None = None,
     ):
+        self._config = trainer_cfg
+        
         self._do_clip = do_clip
         self._grad_norm_dtype = grad_norm_dtype
         self._dataloader_config = dataloader_cfg