Rust rewrite follow-ups

[sharkdp]

• Remove information display / make nicer
• Detect draws
• Sounds(?)
• Settings:
  • AI strength
  • Theme
  • Information display (what kind of information should be shown?)
  • Fullscreen/windowed
• AI
  • Still seems to play extremely weak in some situations.
  • Add heuristic for ring moves
  • Compute both marker placement + ring move in one go (compute principal variation and take action 1 and 3, if 2 is a wait-action for the human player)
  • Search in two different depths? One for immediate threats, one for general gameplay with a more expensive heuristic.
• Choose playing mode (human-AI, AI-human, human-human, AI-AI)
• Cool AI features (tutorial mode; get notified when making blunders)