feat: introduce identity-backed goat

player/player.gd

@@ -59,6 +59,9 @@ func try_interact() -> void:
 	if simulation_manager == null:
 		return
 
+	if try_feed_animal():
+		return
+
 	if try_harvest_resource_node():
 		return
 
@@ -73,6 +76,25 @@ func try_interact() -> void:
 		print("Player ate food from the village supply.")
 
 
+func try_feed_animal() -> bool:
+	if not ("animal_care" in simulation_manager) or simulation_manager.animal_care == null:
+		push_error("Player: SimulationManager has no animal-care service")
+		return false
+	var node: AnimalNode = simulation_manager.animal_care.find_node_for_player(
+		global_position, interaction_range
+	)
+	if node == null:
+		return false
+	if not simulation_manager.has_method("feed_animal"):
+		push_error("Player: SimulationManager cannot feed AnimalNodes")
+		return true
+	if simulation_manager.feed_animal(node.animal_id, -1):
+		print("Player fed %s one food from the village pantry." % node.display_name)
+	else:
+		print("%s is hungry, but the pantry has no food to spare." % node.display_name)
+	return true
+
+
 func try_harvest_resource_node() -> bool:
 	if not simulation_manager.has_method("find_resource_node_for_player"):
 		push_error("Player: SimulationManager cannot find ResourceNodes")