add chat_template

I am guessing, it needs chat_template in order to handle chat properly

tokenizer_config.json

@@ -46,6 +46,7 @@
       null
     ]
   },
+  "chat_template": "{% if not add_generation_prompt is defined %}{% set add_generation_prompt = false %}{% endif %}{% for message in messages %}{{'<|im_start|>' + message['role'] + '\n' + message['content'] + '<|im_end|>' + '\n'}}{% endfor %}{% if add_generation_prompt %}{{ '<|im_start|>assistant\n' }}{% endif %}",
   "bos_token": "<|endoftext|>",
   "clean_up_tokenization_spaces": true,
   "encoding_name": null,