feat: add langchain demo

langchain_dev.py

@@ -0,0 +1,15 @@
+from langchain_huggingface import HuggingFaceEndpoint
+
+import env_config
+
+hf_api_token = env_config.HF_API_TOKEN
+
+
+llm = HuggingFaceEndpoint(
+    repo_id='tiiuae/falcon-7b-instruct',
+    huggingfacehub_api_token=hf_api_token
+)
+
+question = 'Can you still have fun'
+output = llm.invoke(question)
+print(output)

requirements.txt

@@ -1,3 +1,5 @@
 transformers==4.36.0
 sentencepiece
-accelerate
+accelerate
+langchain==0.3.14
+langchain-huggingface==0.1.2