Made README and improved ai:
Enhance AI with utility-based decision making and improve combat dynamics

• Introduced utility-based AI for enemies with actions like attack, retreat, seek cover, strafe, and more.
• Added customizable enemy traits such as aggression, caution, and discipline for diverse AI behavior.
• Improved vision and gun mechanics by introducing separate cones of vision and fire, enhancing line-of-sight checks.
• Enhanced pathfinding with smarter obstacle handling, line-of-sight validation, and adaptive speed adjustments.
• Updated bullet mechanics with new properties (spread, range) and deceleration on penetration.
• Adjusted level design to include more advanced enemy configurations with behavioural traits.

Implement advanced cover system and debug visualisation tools to enable easier debugging of the game