docs: oas (#197)

Adds OpenAPI specification of Storefront and Admin APIs.
Updates docs project.

docs-util/fixture-gen/src/services/test-ful.js

@@ -0,0 +1,49 @@
+import { FulfillmentService } from "medusa-interfaces";
+
+class TestFulService extends FulfillmentService {
+  static identifier = "test-ful";
+
+  constructor() {
+    super();
+  }
+
+  getFulfillmentOptions() {
+    return [
+      {
+        id: "manual-fulfillment",
+      },
+    ];
+  }
+
+  validateFulfillmentData(data, cart) {
+    return data;
+  }
+
+  validateOption(data) {
+    return true;
+  }
+
+  canCalculate() {
+    return false;
+  }
+
+  calculatePrice() {
+    throw Error("Manual Fulfillment service cannot calculatePrice");
+  }
+
+  createOrder() {
+    // No data is being sent anywhere
+    return Promise.resolve({});
+  }
+
+  createFulfillment() {
+    // No data is being sent anywhere
+    return Promise.resolve({});
+  }
+
+  cancelFulfillment() {
+    return Promise.resolve({});
+  }
+}
+
+export default TestFulService;