Adds ability to run effect_on_conditions on either avatar or npc death.

[Ramza13]

Summary

Infrastructure "Adds ability to run effect_on_conditions on either avatar or npc death."

Purpose of change

Adds ability to run effect_on_conditions on either avatar or npc death.
This allows targeted epilogue style messages, though at present they are distinct from and do not replace the actual epilogue screen. Also, as shown in the test code, it allows creating json to switch to controlling a follower on death.
Request from I-am-erk on discord for usage making refugees react to each others deaths and suggestion about controlling follower on death.

Describe the solution

There were too many effect_on_condition bools so I made them an enum for sanity. Added new types for running on either current avatars death or npcs.

Describe alternatives you've considered

Testing

Used this json

{
    "id": "EOC_DEATH_TEST",
    "type": "effect_on_condition",
    "eoc_type": "AVATAR_DEATH",
    "effect": [ { "u_message": "Enjoy not dying if you have a follower.", "popup": true }, "take_control_menu" ]
  },
{
    "type": "npc",
    "id": "refugee_beggar1",
    "//": "Hungry beggar in the refugee center.",
    "name_unique": "Reena Sandhu",
    "gender": "female",
    "name_suffix": "beggar",
    "class": "NC_BEGGAR_1",
    "attitude": 0,
    "mission": 7,
    "chat": "TALK_REFUGEE_BEGGAR_1",
    "faction": "lobby_beggars",
    "death_eocs": [
      {
        "id": "EOC_DEATH_NPC_TEST",
        "eoc_type": "NPC_DEATH",
        "effect": [ { "npc_message": "You are a killer!" } ]
      }
    ]
  },

Additional context

[I-am-Erk]

I almost missed this going in. Will have to take some time to use this.