add new parameters

#1149

Author: beyza

autoware_launch/config/planning/scenario_planning/lane_driving/behavior_planning/behavior_path_planner/behavior_path_planner.param.yaml

@@ -19,6 +19,8 @@
     turn_signal_shift_length_threshold: 0.3
     turn_signal_remaining_shift_length_threshold: 0.1
     turn_signal_on_swerving: true
+    check_bidirectional_lane: false
+    traffic_flow: "left_side" # right or left
 
     enable_akima_spline_first: false
     enable_cog_on_centerline: false