Add hitmarker and hitmarker headshot sounds
Add Crosshair class and add it to the Hud
Add support for setting an ammo type and ammo amount on shop items to give free ammo when purchased
Set Crossbow ammo type and amount
Add Ammo to WeaponItem and serialize/deserialize it
Update Weapon to use item's Ammo variable in AmmoClip setter/getter
Update BulletDropProjectile to have TraceResult in hit callback
Show hit marker for attacker in TakeDamage
Have victim take damage when hit by crossbow projectile
Merge branch 'main' of sbox-corewars