add models / services / handlers of user / token / 2fa, add web server command

pkg/models/two_factor_recovery_code.go

@@ -0,0 +1,13 @@
+package models
+
+type TwoFactorRecoveryCode struct {
+	Uid             int64  `xorm:"PK"`
+	RecoveryCode    string `xorm:"VARCHAR(64) PK"`
+	Used            bool   `xorm:"NOT NULL"`
+	CreatedUnixTime int64
+	UsedUnixTime    int64
+}
+
+type TwoFactorRecoveryCodeLoginRequest struct {
+	RecoveryCode string `json:"recoveryCode" binding:"required,notBlank,len=11"`
+}