AI Behavior (and Unit Optimizations)

1. All nations (excluding the player nation) now have basic AI behavior (spawning units, moving them around, attacking, etc.).,

2. Increased per Unit soldiers to 3,000 (performance reasons, I can easily increase or decrease this; it's just a variable),

3. Unit rendering is still not optimized.,

4. Unit movement has been highly optimized (allowing thousands of units to move simultaneously with minimal CPU usage).

5. Unit Rendering Optimized: 20-50 ms CPU frame time → 10 ms CPU frame time (~40-50 FPS -> ~150 FPS) on my CPU