fix: unzip kaggle data (#464)

* unzip kaggle data

* read local_data_path from .env file

* fix build docs error

* recover azure-identity packages

* optimize code logic

* add error when downloading data from kaggle

---------

Co-authored-by: Xu Yang <peteryang@vip.qq.com>

rdagent/core/exception.py

@@ -42,3 +42,9 @@ class ModelEmptyError(Exception):
     """
     Exceptions raised when no model is generated correctly
     """
+
+
+class KaggleError(Exception):
+    """
+    Exceptions raised when calling Kaggle API
+    """