Fix module not found: add root directory to sys path

gui/streamlit_app.py

@@ -1,3 +1,8 @@
+import os
+import sys
+
+sys.path.append(os.path.join(os.path.dirname(__file__), os.path.pardir))
+
 import streamlit as st
 import phind
 
@@ -45,4 +50,4 @@ hide_streamlit_style = """
             footer {visibility: hidden;}
             </style>
             """
-st.markdown(hide_streamlit_style, unsafe_allow_html=True) 
+st.markdown(hide_streamlit_style, unsafe_allow_html=True)