Create Basic AI Dealer Logic

[Junaid-Kureshi]

Implement basic decision-making AI for the dealer opponent.

Requirements:

• Create DealerAI.gd with decision-making logic
• Implement probability calculations for known vs unknown shells
• Add strategic item usage
• Create difficulty levels (easy, medium, hard)
• Add realistic decision delays and animations
• Handle dealer targeting decisions

Acceptance Criteria:

• AI makes logical decisions based on game state
• Different difficulty levels show different behaviors
• AI uses items strategically
• Decision delays create realistic feel
• AI never cheats or breaks game rules

Files to modify:

• scripts/ai/DealerAI.gd
• Connect to GameManager and UI systems

Testing:
Play multiple games and verify AI makes reasonable strategic decisions.