chore: add PaymentResource to expose payment creation endpoint

Author: otaviojava

src/main/java/com/acme/payment/PaymentResource.java

@@ -0,0 +1,27 @@
+package com.acme.payment;
+
+import jakarta.inject.Inject;
+import jakarta.ws.rs.POST;
+import jakarta.ws.rs.Path;
+import jakarta.ws.rs.core.Response;
+
+@Path("/payments")
+public class PaymentResource {
+
+
+    private final PaymentService service;
+
+    @Inject
+    public PaymentResource(PaymentService service) {
+        this.service = service;
+    }
+
+    PaymentResource() {
+        this.service = null;
+    }
+
+    @POST
+    public Response create(PaymentRequest request) {
+        return Response.accepted(service.create(request)).build();
+    }
+}