chore: implement 2fa auth (#2968)

* chore: implement 2fa auth

from #2786

* chore: format code

* chore: replace two factor token input with qr-code

* chore: requesting confirmation of setting/removing two-factor authentication

otpauth library was taken from cdnjs

* chore: revert changes in `ClipboardManager`

don't need it.

* chore: removing twoFactor prop in settings page

* chore: remove `twoFactorQr` object in `mounted` function

web/assets/js/model/setting.js

@@ -23,8 +23,9 @@ class AllSetting {
         this.tgBotLoginNotify = true;
         this.tgCpu = 80;
         this.tgLang = "en-US";
+        this.twoFactorEnable = false;
+        this.twoFactorToken = "";
         this.xrayTemplateConfig = "";
-        this.secretEnable = false;
         this.subEnable = false;
         this.subTitle = "";
         this.subListen = "";