beast mode-health regen rework

In vanilla Dying Light the beast, Beast Mode is meant to make you feel unstoppable — a raging force tearing through enemies — but the default health in beast mode regeneration never does that. You lose health too fast, recover too slowly, what's the point in the regeneration if you can't regenerate fast enough. This mod rebalances Beast Mode’s healing system to finally make it feel the way it was intended. With this adjustment, each hit now restores a realistic amount of health, letting you stay in the fight longer without breaking the game’s challenge or turning into God mode. You’ll still need to stay strategic and smart, but you can now have a better chance of survival in boss fights and crowds of walkers without constantly dying or dropping out of Beast Mode just to heal.