feat: add welcome message

sorbobotapp/app.py

@@ -76,6 +76,18 @@ with chat_column:
     information_placeholder = st.container()
 
     with chat_placeholder:
+        div = f"""
+            <div class="chat-row">
+                <img class="chat-icon" src="https://cdn-icons-png.flaticon.com/512/1129/1129398.png" width=32 height=32>
+                <div class="chat-bubble ai-bubble">
+                    Welcome to SorboBot, a Hugging Face Space designed to revolutionize the way you find published articles. <br/>
+                    Powered by a full export from ScanR and Hal at Sorbonne University, SorboBot utilizes advanced language model technology
+                    to provide you with a list of published articles based on your prompt.
+                </div>
+            </div>
+        """
+        st.markdown(div, unsafe_allow_html=True)
+
         for chat in st.session_state.history:
             div = f"""
                 <div class="chat-row