Add UI Animations

[Waidhoferj]

We've got the basics in place, let's make this app really come alive:

• Welcome card scales up, fades in and translates up on page load (one motion)
• New messages fade in and scale up to their default size (one motion)
• A cascading fade in for FAQs (top downwards)
• Add a slight scale on press to all buttons

All except for the last bullet are going to require a robust animation library. It's a great opportunity to get familiar with React Spring or Framer Motion. Both are amazing so take your pick.

[Jason-Ku]

I'll give this a shot 🐧