✅(e2e) remove some flakiness

Service worker added some flakiness, we
activate the sw only if not from the CI.
We add as well the email of the user added in a
doc to the toast message. This way we can check
if the user was added correctly, this will remove
some flakiness in some tests.

src/frontend/apps/e2e/__tests__/app-impress/common.ts

@@ -119,7 +119,9 @@ export const addNewMember = async (
 
   await page.getByRole('button', { name: 'Validate' }).click();
 
-  await expect(page.getByText(`User added to the document.`)).toBeVisible();
+  await expect(
+    page.getByText(`User ${users[index].email} added to the document.`),
+  ).toBeVisible();
 
   return users[index].email;
 };