Add Flashduty notification (#3475)

* feat: add FlashDuty notification channel

* refactor: #3475 nofify with Up or Down;
refactor code;
add en zh-hk zh-tw lang

* refactor: default select Info

* refactor: add space in word

* refactor the flashduty notification code

* refactor:compatible when Test flashduty nofication

* refactor: add function param description

* refactor: revert zh-hk zh-tw changes of flashduty

src/components/NotificationDialog.vue

@@ -158,6 +158,7 @@ export default {
                 "AliyunSMS": "AliyunSMS (阿里云短信服务)",
                 "DingDing": "DingDing (钉钉自定义机器人)",
                 "Feishu": "Feishu (飞书)",
+                "FlashDuty": "FlashDuty (快猫星云)",
                 "FreeMobile": "FreeMobile (mobile.free.fr)",
                 "PushDeer": "PushDeer",
                 "promosms": "PromoSMS",