add perceived pain assigning for math

[GuardianDll]

Summary

None

Purpose of change

Prior to this, the only way to add pain to character bypassed all pain sensitivity/insensitivity like mutations, effects etc

Describe the solution

Add proper handling for such cases
Check all (i hope) pain assignments and add where it is necesary

Testing

Spoiler warning

{
"type": "effect_on_condition",
"id": "EOC_TEST_PAIN",
"effect": [
  { "math": [ "_current_pain_perceived", "=", "u_pain('type': 'perceived')" ] },
  { "math": [ "_current_pain_raw", "=", "u_pain('type': 'raw')" ] },
  {
    "u_message": "_current_pain_perceived: <context_val:current_pain_perceived>, _current_pain_raw: <context_val:current_pain_raw>"
  }
]

},

{
"type": "effect_on_condition",
"id": "VERY_TESTY_2",
"effect": [
{ "u_message": "we didn't modify anything" },
{ "run_eocs": [ "EOC_TEST_PAIN" ] },
{ "math": [ "u_pain('type': 'perceived')", "=", "100" ] },
{ "u_message": "We assign 100 perceived pain" },
{ "run_eocs": [ "EOC_TEST_PAIN" ] },
{ "math": [ "u_pain()", "=", "0" ] },
{ "u_message": "we zeroing pain" },
{ "run_eocs": [ "EOC_TEST_PAIN" ] },
{ "math": [ "u_pain('type': 'perceived')", "+=", "100" ] },
{ "u_message": "we add 100 perceived pain" },
{ "run_eocs": [ "EOC_TEST_PAIN" ] }
]
}

Additional context

Spend like a week thinking what i did wrong when, in fact, i did nothing wrong, it's just preceived pain works in weird way (also i messed up some variables so it printed utter bullshit)