Add Complete missions dialog function

[Ramza13]

Summary

None

Purpose of change

Fixes #30905
Allow custom mission handling to help out I-am-erk

Describe the solution

Describe alternatives you've considered

Testing

Used this json

  {
    "id": "migo_bio_tech",
    "type": "TOOL",
    "name": { "str_sp": "Mi-go Biotech" },
    "description": "A piece of mi-go biotechnology.",
    "weight": "1 g",
    "volume": "250 ml",
    "price": 3000,
    "price_postapoc": 10000,
    "symbol": "!",
    "color": "light_red",
    "use_action": {
      "type": "effect_on_conditions",
      "description": "Touch the opening.",
      "effect_on_conditions": [
        {
          "id": "EOC_MIGO_BIO_TECH_INTEREST",
          "effect": [
            { "assign_mission": "MISSION_HELICOPTER_REFUEL" }
          ]
        }
      ]
    }
    },
    {
      "id": "migo_bio_tech2",
      "type": "TOOL",
      "name": { "str_sp": "Mi-go2 Biotech" },
      "description": "A piece of mi-go biotechnology.",
      "weight": "1 g",
      "volume": "250 ml",
      "price": 3000,
      "price_postapoc": 10000,
      "symbol": "!",
      "color": "light_red",
      "use_action": {
        "type": "effect_on_conditions",
        "description": "Touch the opening.",
        "effect_on_conditions": [
          {
            "id": "EOC_MIGO_BIO_TECH_INTEREST2",
            "effect": [
              { "finish_mission": "MISSION_HELICOPTER_REFUEL", "success":true }
            ]
          }
        ]
      }
  }

Additional context

[I-am-Erk]

With this, we can use dialogue conditionals to do a ton of cool things:

• get a mission from one NPC that you complete on contact via another NPC, or even an EOC from activating an item or other
• get a mission that is completed through any manner of dialogue conditionals... for example, if you have one of this item and interact with this piece of furniture, an eoc trigger can remove the item and complete the mission and ran an update_mapgen (eg. mission to plug a usb key into a computer)
• have npcs with multiple nonlinear missions, eg. a quest line around maknig contact with and dealing with multiple different factions at once

[I-am-Erk]

So, when I hand my anesthesia kits over to Rubik and activate the complete quest effect, I get the following message:

It may be unrelated, but I can't see anything else in the dialogue that would cause that:

      {
        "text": "I've brought those anaesthetic kits for you.  Can you help me out?",
        "condition": { "and": [ { "u_has_items": { "item": "anesthetic_kit", "count": 2 } }, { "u_has_mission": "RUBIK_ANUS_FETICK" } ] },
        "effect": [
          { "u_sell_item": "anesthetic_kit", "count": 2 },
          { "finish_mission": "RUBIK_ANUS_FETICK", "success": true }
        ],
        "topic": "TALK_EXODII_MERCHANT_ExodizeMe2"
      }

Any ideas?

[I-am-Erk]

Curiously, when I had extra anesthesia kits on my person it did not give me that message. Not when Rubik has extra kits though.