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

database/model/model.go

@@ -21,10 +21,9 @@ const (
 )
 
 type User struct {
-	Id          int    `json:"id" gorm:"primaryKey;autoIncrement"`
-	Username    string `json:"username"`
-	Password    string `json:"password"`
-	LoginSecret string `json:"loginSecret"`
+	Id       int    `json:"id" gorm:"primaryKey;autoIncrement"`
+	Username string `json:"username"`
+	Password string `json:"password"`
 }
 
 type Inbound struct {