refactor(mandate): allow merchant to pass the mandate details and customer acceptance separately (#1188)

crates/api_models/src/payment_methods.rs

@@ -429,6 +429,9 @@ pub struct PaymentMethodListResponse {
     ]
     ))]
     pub payment_methods: Vec<ResponsePaymentMethodsEnabled>,
+    /// Value indicating if the current payment is a mandate payment
+    #[schema(example = "new_mandate_txn")]
+    pub mandate_payment: Option<payments::MandateTxnType>,
 }
 
 #[derive(Eq, PartialEq, Hash, Debug, serde::Deserialize, ToSchema)]