脚本触发器
has_unlocked_global_law_trigger
检查内容
拥有全局变量：
unlocked_global_law_$type$调用它的脚本会填入这些值，各调用处见“关联”。
$type$
custom_description = {
text = has_unlocked_global_law_trigger_text
value = law:$type$
has_global_variable = unlocked_global_law_$type$
}