feat: add streaming

src/app.py

@@ -63,7 +63,7 @@ def get_response(user_query, chat_history, db):
   | StrOutputParser()
   )
   
-  return chain.invoke({
+  return chain.stream({
     "question": user_query
   })
   
@@ -110,13 +110,11 @@ if user_query is not None and user_query != "":
         st.markdown(user_query)
 
     with st.chat_message("AI"):
-        response = get_response(
+        response = st.write_stream(get_response(
             user_query, 
             st.session_state.chat_history,
             st.session_state.db
-          )
-        print(f"Response generated: {response}")
-        st.markdown(response)
+          ))
         
     st.session_state.chat_history.append(AIMessage(content=response))