test: Move @testing-library/jest-dom import to test setup file

This removes `@testing-library/jest-dom` from single test files and adds it to the shared setup.ts file.

src/test/Components/ShareImageModal/ShareImageModal.test.tsx

@@ -1,6 +1,5 @@
 import React from 'react';
 
-import '@testing-library/jest-dom';
 import { screen, waitFor } from '@testing-library/react';
 import userEvent from '@testing-library/user-event';