feat(charge):增加计费记录查询功能，待测。

model/user_charges.go

@@ -22,3 +22,12 @@ type UserCharge struct {
 func (UserCharge) TableName() string {
 	return "user_charge"
 }
+
+type ChargeWithName struct {
+	UserDetail `xorm:"extends"`
+	UserCharge `xorm:"extends"`
+}
+
+func (ChargeWithName) TableName() string {
+	return "user_charge"
+}