Adapt guest spec tests to the new API format

tests/guests.spec.ts

@@ -2,32 +2,26 @@ import { test, expect, Page } from '@playwright/test'
 
 const mockGuestsAPI = ({ page }: { page: Page }) => {
   page.route('*/**/api/guests.json', async route => {
-    const json = {
-      data: [
+    const json = [
       {
         "id": "f4a09c28-40ea-4553-90a5-96935a59cac6",
-          "type": "guest",
-          "attributes": {
-            "id": "f4a09c28-40ea-4553-90a5-96935a59cac6",
-            "group_id": "2fcb8b22-6b07-4c34-92e3-a2535dbc5b14",
         "status": "Tentative",
         "name": "Kristofer Rohan DVM",
-            "group_name": "Childhood friends"
+        "group": {
+          "id": "2fcb8b22-6b07-4c34-92e3-a2535dbc5b14",
+          "name": "Childhood friends",
         }
       },
       {
         "id": "bd585c40-0937-4cde-960a-bb23acfd6f18",
-          "type": "guest",
-          "attributes": {
-            "id": "bd585c40-0937-4cde-960a-bb23acfd6f18",
-            "group_id": "da8edf26-3e1e-4cbb-b985-450c49fffe01",
         "status": "Invited",
         "name": "Olevia Quigley Jr.",
-            "group_name": "Work"
+        "group": {
+          "id": "da8edf26-3e1e-4cbb-b985-450c49fffe01",
+          "name": "Work",
         }
       },
-      ]
-    };
+    ];
 
     await route.fulfill({ json })
   })