Enhance documentation and update .gitignore for model conversion scripts

inference/convert.py

@@ -31,6 +31,18 @@ mapping = {
 
 
 def main(hf_ckpt_path, save_path, n_experts, mp):
+    """
+    Converts and saves model checkpoint files into a specified format.
+
+    Args:
+        hf_ckpt_path (str): Path to the directory containing the input checkpoint files.
+        save_path (str): Path to the directory where the converted checkpoint files will be saved.
+        n_experts (int): Total number of experts in the model.
+        mp (int): Model parallelism factor.
+        
+    Returns:
+        None
+    """
     torch.set_num_threads(8)
     n_local_experts = n_experts // mp
     state_dicts = [{} for _ in range(mp)]