feat: Implement a new portal door game mode with arena partitioning, dynamic connections, and multiplayer synchronization.

scenes/main.gd

@@ -58,6 +58,14 @@ func _ready():
 	if multiplayer.is_server():
 		randomize_game_grid()
 
+@rpc("any_peer", "call_local", "reliable")
+func sync_portal_configs(configs: Array):
+	if portal_mode_manager:
+		# Temporarily store the configs and trigger spawn
+		# Note: We use a custom property in manager to pass this
+		portal_mode_manager.set_meta("door_configs", configs)
+		portal_mode_manager._spawn_portal_doors()
+
 	# Force gridmap cell size to match player logic (1, 0.05, 1) - >0.001 to avoid errors
 	var em = $EnhancedGridMap
 	if em: