feat: Payment system with voucher cards.

feat: Design with inversion dependency injection architecture.
feat: Prettier http middleware.
feat: Re-write items categories with preferred accounts.

server/src/services/Payment/PaymentMethod.ts

@@ -0,0 +1,6 @@
+import moment from 'moment';
+import { IPaymentModel } from '@/interfaces';
+
+export default class PaymentMethod implements IPaymentModel {
+
+}