Implement new FlatList Screen

[sansyrox]

UseCases

• Horizontal Mode
• Pull To Refresh
• Separator Support
  • Currently present but not optional in the demo
• Multiple Column Support
  • ToDo
• Header Support
  • Currently present but not optional in the demo
• Footer Support
  • Currently present but not optional in the demo
• ScrollToIndex Support
• Scroll Loading

E2E Tests

• List should be scrollable and each item should be tappable
• Horizontal list should be scrollable and each item should be tappable

[manyaagarwal]

PR to close this: react#29909