Medical - Add configurable armor pain system

[fedoraman737]

When merged this pull request will:

• This a near duplicate of Medical - Add configurable armor pain system with threshold #266 due to merge conflicts
• Adds pain effects when armor stops incoming kinetic/melee damage
  • First significant armor hit (above threshold) sets pain to MODERATE + additional damage based on multiplier
  • Subsequent hits while already in pain (at/beyond MODERATE) add no additional pain
  • Per maintainer's feedback: prevents armor spam from continuously increasing pain
• Adds configurable thresholds and modifiers for damage to pain hitzone from ArmorHitEvent()

Question... should first hit be capped at exactly MODERATE, or allowed to exceed based on impact severity (current implementation)?

Note: the configuration is at the prefab level.

[Kexanone]

Question... should first hit be capped at exactly MODERATE, or allowed to exceed based on impact severity (current implementation)?

I think the implementation is fine, but I forgot that MODERATE (=0.8 scaled health) is exactly the lowest possible pain threshold.
I would propose introducing a custom attribute as threshold instead and set the default to something like 0.7 scaled health.