Add reset functionality to player selection in app.py

- Introduced a reset button that clears player selection and resets related variables to their default states, improving user experience by allowing easy reconfiguration of player choices.

app.py

@@ -251,7 +251,23 @@ with tab2:
                     unique_players = [p for p in unique_players if p != 'nan']  # Remove any NaN values
                     player_parse_var = st.selectbox("Do you want to view lineups with specific player(s)?", ['All', 'Specific'], key = 'player_parse_var')
                     player_names = st.multiselect("Select players", options=unique_players, default=[], key = 'player_names')
-                submitted = st.form_submit_button("Submit")
+                submit_col, reset_col, blank_col = st.columns([1, 1, 8])
+                with submit_col:
+                    submitted = st.form_submit_button("Submit")
+                with reset_col:
+                    reset = st.form_submit_button("Reset")
+                    if reset:
+                        entry_names = []
+                        low_entries_var = 1
+                        high_entries_var = 150
+                        stack_names = []
+                        stack_size_names = []
+                        player_names = []
+                        player_parse_var = 'All'
+                        stack_parse_var = 'All'
+                        stack_size_parse_var = 'All'
+                        entry_parse_var = 'All'
+                
                 if submitted:
                     if 'player_frame' in st.session_state:
                         del st.session_state['player_frame']