feat: support newer Postman export format with collection envelope (#8038)

- Updated the Postman collection importer to handle collections wrapped in a { collection: { ... } } format.
- Enhanced the parsing logic to extract collection info correctly from both legacy and newer formats.
- Added a new test case for importing a Postman v2.1 collection with the wrapped format to ensure compatibility.

tests/import/postman/fixtures/postman-v21-wrapped.json

@@ -0,0 +1,66 @@
+{
+  "collection": {
+    "info": {
+      "name": "Postman v2.1 Wrapped Collection",
+      "description": "Test collection using newer Postman export format with collection envelope",
+      "schema": "https://schema.getpostman.com/json/collection/v2.1.0/collection.json",
+      "_postman_id": "beaf4d12-a72a-47cb-902d-2942a68a59c4"
+    },
+    "item": [
+      {
+        "name": "Get Users",
+        "request": {
+          "method": "GET",
+          "header": [
+            {
+              "key": "Authorization",
+              "value": "Bearer {{token}}",
+              "type": "text"
+            }
+          ],
+          "url": {
+            "raw": "{{baseUrl}}/users",
+            "host": ["{{baseUrl}}"],
+            "path": ["users"],
+            "query": [
+              {
+                "key": "page",
+                "value": "1"
+              }
+            ]
+          }
+        },
+        "response": []
+      },
+      {
+        "name": "Create User",
+        "request": {
+          "method": "POST",
+          "header": [
+            {
+              "key": "Content-Type",
+              "value": "application/json",
+              "type": "text"
+            }
+          ],
+          "body": {
+            "mode": "raw",
+            "raw": "{\n  \"name\": \"John Doe\",\n  \"email\": \"john@example.com\"\n}"
+          },
+          "url": {
+            "raw": "{{baseUrl}}/users",
+            "host": ["{{baseUrl}}"],
+            "path": ["users"]
+          }
+        },
+        "response": []
+      }
+    ],
+    "variable": [
+      {
+        "key": "baseUrl",
+        "value": "https://api.example.com"
+      }
+    ]
+  }
+}

tests/import/postman/import-postman-v21-wrapped.spec.ts

@@ -0,0 +1,17 @@
+import { test } from '../../../playwright';
+import * as path from 'path';
+import { closeAllCollections, importCollection } from '../../utils/page';
+
+test.describe('Import Postman Collection v2.1 (wrapped format)', () => {
+  test.afterEach(async ({ page }) => {
+    await closeAllCollections(page);
+  });
+
+  test('Import Postman Collection v2.1 with collection envelope successfully', async ({ page, createTmpDir }) => {
+    const postmanFile = path.resolve(__dirname, 'fixtures', 'postman-v21-wrapped.json');
+
+    await importCollection(page, postmanFile, await createTmpDir('postman-v21-wrapped-test'), {
+      expectedCollectionName: 'Postman v2.1 Wrapped Collection'
+    });
+  });
+});