Added in gradual damage linked to Oxy

- When above 50 Oxy Damage or when crit, patients will start developping
heart and brain damage
- This change is supposed to make defib revival a bit harder on patients
who have mostly died out of oxy damage
- Status degrades slower with Inaprov or Bicardine, and basically doesn't degrade with both

If left untreated, progression will be brutal (how brutal it is will come with balancing, local server testing is hit and miss) and most likely force a bit of surgery (chest and head, or chest and Alky) before defibbing. If treated correctly it'll allow crit patients to survive as usual, although it WILL still degrade their status quickly if left unchecked or badly treated (only Inaprov will only have so much of an effect)