Implement inventory system with item management and pickup functionality

GameCore/Combat/WeaponSystem.cs

@@ -27,6 +27,8 @@ public class WeaponSystem : ISystem
 
             if (input.IsFiring && weapon.CooldownTimer <= 0f)
             {
+                // Check for ammo if applicable
+                
                 var context = new EffectContext { World = world, Owner = entity };
 
                 foreach (var effect in weapon.OnFireEffects) effect.Execute(context);