Feat/serialize deserialize (#508)

Co-authored-by: Taranjeet Singh <reachtotj@gmail.com>

embedchain/apps/OpenSourceApp.py

@@ -3,10 +3,12 @@ from typing import Iterable, Union, Optional
 
 from embedchain.config import ChatConfig, OpenSourceAppConfig
 from embedchain.embedchain import EmbedChain
+from embedchain.helper_classes.json_serializable import register_deserializable
 
 gpt4all_model = None
 
 
+@register_deserializable
 class OpenSourceApp(EmbedChain):
     """
     The OpenSource app.