Add IBAN and BIC validation with custom hooks; update localization messages and cache timestamps

custom/Espo/Custom/Resources/i18n/en_US/CBankverbindungen.json

@@ -37,5 +37,10 @@
             "unclean": "Discrepancies",
             "failed": "Failed"
         }
+    },
+    "messages": {
+        "invalidIbanChecksum": "The entered IBAN is invalid. Please check for typos.",
+        "invalidBicLength": "The BIC/SWIFT code must be 8 or 11 characters long.",
+        "invalidBicFormat": "The entered BIC/SWIFT code has an invalid format. Example: COBADEFFXXX"
     }
 }