fix: detailContainer Component - Replaced class by func. comp (#130)

* refactor: coverted class comp. into func.comp

* refactor: added forward ref comp.

* fix: fixed external link color

* fix: fixed typo

* refactor: applied feedbacks

src/components/DetailContainer/DetailContainer.test.tsx

@@ -0,0 +1,13 @@
+import React from 'react';
+
+import { render } from '@testing-library/react';
+
+import DetailContainer from './DetailContainer';
+
+describe('DetailContainer', () => {
+  test('renders correctly', () => {
+    const { container } = render(<DetailContainer />);
+    expect(container.firstChild).toMatchSnapshot();
+  });
+  test.todo('should test click on tabs');
+});