various fixes and tunings

fix: npc wont attack enemies in ragdoll state (fixes the problem when ragdoll cant die and npcs gather around)

added something needed for W1 in the future

lodged bullet fix

added startup tests

bandit ragdol hit

bandit shooting player head will resulkt in 75% damage instead of instant kill.

- zombies eating bandit corpses
- zombies low bite attack animation for prone bandits

- zombies will now head to sounds emitted by bandit firearms
- player damage taken from bandit firearms is reworked completely. Chance to hit specific part is calculated realistically, favoring chest parts the most, feet, hands, neck and head the least. Bullet protective clothes such as bulletproff vest will work against bandit bullets. Shot in the head is least probable but result in instant death.

high fence bandit climb fix