feat: add initial starvation consequence

simulation/SimulationManager.gd

@@ -94,3 +94,10 @@ func add_safety(amount: float) -> void:
 func add_knowledge(amount: float) -> void:
 	village.knowledge += amount
 	village_changed.emit(village)
+	
+func get_starving_count() -> int:
+	var count := 0
+	for npc in npcs:
+		if npc.is_starving:
+			count += 1
+	return count