ESLint: Add rule to sort imports alphabetically

The `import/order` rule isn't enough to sort import within a single import group alphabetically.

This adds `sort-imports` rule that handles the sorting within groups.

src/Components/CreateImageWizard/steps/Repositories/index.tsx

@@ -1,6 +1,6 @@
 import React from 'react';
 
-import { Alert, Form, Content, Title } from '@patternfly/react-core';
+import { Alert, Content, Form, Title } from '@patternfly/react-core';
 
 import ManageRepositoriesButton from './components/ManageRepositoriesButton';
 import Repositories from './Repositories';