14.城鎮事件
文件campaign/town_events/_
標準格式：
{
"id": "事件名",
"base_chance": 基礎概率份額,
"per_not_rolled_additional_chance": 疊加概率份額,
"cooldown": 冷卻週數,
"requirements": { (前提要求)
"minimum_week": 最小週數,
"dead_heroes": 死亡英雄數,
"hero_level_counts": [英雄等級],
"upgrades_purchased": [建築升級],
"trinket_storage_count": 飾品總數
},
"town_ambience_paramater_ids": [],
"tone": "good好/ neutral中性/ bad壞",
"sprite": "觸發建築效果",
"sprite_attachment": "目標建築",
"data": [事件內容]
},
城鎮事件的概率份額是全體計算的，想要特定事件頻繁出現的話建議改成7位數以上
