Add table display for contest file preview in app.py

- Enhanced the user interface by adding a table view to display the first 10 rows of the contest file when the helper is present, improving visibility of contest data.
- Maintained existing functionality while further enhancing the user experience during contest file loading operations.

app.py

@@ -97,6 +97,7 @@ with tab1:
 
         if 'Contest_file' in st.session_state:
             if 'Contest_file_helper' in st.session_state:
+                st.table(st.session_state['Contest_file'].head(10))
                 st.session_state['Contest'], st.session_state['ownership_df'], st.session_state['actual_df'], st.session_state['salary_df'], st.session_state['team_df'], st.session_state['pos_df'], st.session_state['entry_list'], check_lineups = load_contest_file(st.session_state['Contest_file'], st.session_state['Contest_file_helper'], sport_select)
             else:
                 st.table(st.session_state['Contest_file'].head(10))