added streamlit app

app.py

@@ -0,0 +1,8 @@
+import streamlit as st
+
+st.title("Hugging Face + Streamlit Demo")
+st.write("This is a demo Streamlit app for my Hugging Face repo!")
+
+# Example interactive widget
+user_input = st.text_input("Enter some text")
+st.write(f"You entered: {user_input}")