feat:H1083-L1-L3-L4-L5 [Payment Authorise and Sync] + [Refunds and Sync] + [Redirection Flow (BNPL)] + [3DS Payment and Sync] for MultiSafePay (#658)

Co-authored-by: Zaid <syed.zaidali@juspay.in>
Co-authored-by: Rajak Rupakkumar Asishkumar <rajak.rupakkumar@juspay.in>
Co-authored-by: Jagan Elavarasan <jaganelavarasan@gmail.com>

crates/api_models/src/enums.rs

@@ -555,6 +555,7 @@ pub enum Connector {
     Fiserv,
     Globalpay,
     Klarna,
+    Multisafepay,
     Nuvei,
     Payu,
     Rapyd,
@@ -605,6 +606,7 @@ pub enum RoutableConnectors {
     Stripe,
     Worldline,
     Worldpay,
+    Multisafepay,
 }
 
 /// Wallets which support obtaining session object