feat: author resource-aware riverbank grove

tests/jajce_world_scaffold_test.gd

@@ -324,7 +324,7 @@ func _run() -> void:
 	_check(lookdev.has_node("BeautyCamera"), "Lookdev should provide a beauty camera")
 	lookdev.free()
 
-	var resources := world.get_node("WorldObjects/ResourceNodes").get_children()
+	var resources := _collect_resource_nodes(world.get_node("WorldObjects"))
 	var ids: Array[String] = []
 	for resource in resources:
 		ids.append(String((resource as ResourceNode).node_id))
@@ -561,6 +561,16 @@ func _check(condition: bool, message: String) -> void:
 		failures.append(message)
 
 
+func _collect_resource_nodes(parent: Node) -> Array[ResourceNode]:
+	var resources: Array[ResourceNode] = []
+	for child in parent.get_children():
+		if child is ResourceNode:
+			resources.append(child)
+		else:
+			resources.append_array(_collect_resource_nodes(child))
+	return resources
+
+
 func _check_path_tracks_terrain(
 	terrain: Terrain3D, path: PackedVector3Array, message: String
 ) -> void: