Animate pieces movement

[Nimzozo]

What needs animation :

• [x] failed drop
  • [x] outside the board
  • [x] inside the board
• [x] succeeded drop
  • [x] normal moves
  • [x] captures
  • [x] castles
  • [x] promotions
• [x] programmatic moves
  • [x] normal moves
  • [x] captures
  • [x] castles
  • [x] promotions
• [x] game navigation
  • [x] normal moves
  • [x] captures
  • [x] castles
  • [x] promotions