feat: Modify Database Input Method in Streamlit App

- Changed user input from a text area to a selection box, providing SQL_PROMPTS options
- Added SQL_PROMPTS module

Author: DShomin

interface/streamlit_app.py

@@ -1,6 +1,7 @@
 import streamlit as st
 from langchain_core.messages import HumanMessage
 from llm_utils.graph import builder
+from langchain.chains.sql_database.prompt import SQL_PROMPTS
 
 # Streamlit 앱 제목
 st.title("Lang2SQL")
@@ -11,9 +12,10 @@
     value="고객 데이터를 기반으로 유니크한 유저 수를 카운트하는 쿼리",
 )
 
-user_database_env = st.text_area(
+user_database_env = st.selectbox(
     "db 환경정보를 입력하세요:",
-    value="duckdb",
+    options=SQL_PROMPTS.keys(),
+    index=0,
 )