feat: Implement player movement, rotation, and advanced push mechanics with new PlayerMovementManager, StopNGoManager, and player scene script.

scenes/player.gd

@@ -1257,6 +1257,17 @@ func move_player_to_clicked_position(grid_position: Vector2i):
 
 @rpc("any_peer", "call_local")
 func start_movement_along_path(path: Array, clear_visual: bool = true):
+	# SERVER-SIDE VIOLATION CHECK (for Stop n Go)
+	if multiplayer.is_server() and LobbyManager.game_mode == "Stop n Go":
+		var main = get_tree().root.get_node_or_null("Main")
+		if main:
+			var sng_manager = main.get_node_or_null("StopNGoManager")
+			if sng_manager and sng_manager.has_method("check_movement_violation"):
+				# Check if the START of this movement is a violation
+				# We use current_position as the 'from' point.
+				var target_pos = Vector2i(path[0].x, path[0].y) if path.size() > 0 else current_position
+				sng_manager.check_movement_violation(name.to_int(), current_position, target_pos)
+
 	is_player_moving = true
 	if path.size() > 0:
 		target_position = Vector2i(path[-1].x, path[-1].y)