feat: add supplier payment and allocation models, API, and frontend components

- Created `SupplierPayment` and `SupplierPaymentGRN` models for managing supplier payments and their allocations.
- Implemented API endpoints for listing and creating supplier payments.
- Developed frontend components for displaying and recording supplier payments, including a dialog for payment creation.
- Integrated GRN allocations into the payment creation process, ensuring total allocations match the payment amount.
- Added pagination and loading states for the payments list.

Distribution/Models/Payment.cs

@@ -16,5 +16,16 @@ namespace Distribution.Models
         public DateTime CollectedAt { get; set; }
         public Guid CollectedBy { get; set; }
         public Guid? RecordedBy { get; set; }
+
+        // Cash/Bank account that received the funds. Required when Method = Cash;
+        // for Cheque, the FK_ReceivedCheque below carries the deposit account once deposited.
+        public Guid? FK_BankAccountId { get; set; }
+        [ForeignKey("FK_BankAccountId")]
+        public BankAccount? BankAccount { get; set; }
+
+        // Cheque record auto-created when Method = Cheque. Null for Cash/Credit payments.
+        public Guid? FK_ReceivedChequeId { get; set; }
+        [ForeignKey("FK_ReceivedChequeId")]
+        public ReceivedCheque? ReceivedCheque { get; set; }
     }
 }