added initatePayment and checkTxnStatus

src/main/java/com/billpaymentservice/bbps/dto/response/BillPaymentResponse.java

@@ -0,0 +1,21 @@
+package com.billpaymentservice.bbps.dto.response;
+
+import com.billpaymentservice.bbps.dto.GeneralResp;
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+public class BillPaymentResponse {
+
+    private String txnId;
+    private String refId;
+    private String billerId;
+    private String billerCategory;
+    private String actionType;
+    private String status;
+    private double txnAmount;
+    private String paymentMode;
+    private String currency;
+    private GeneralResp genericResponse; // ✅ Common response block
+}