SC2: Content update (#5312)

Feature highlights:
- Adds many content to the SC2 game
- Allows custom mission order
- Adds race-swapped missions for build missions (except Epilogue and NCO)
- Allows War Council Nerfs (Protoss units can get pre - War Council State, alternative units get another custom nerf to match the power level of base units)
- Revamps Predator's upgrade tree (never was considered strategically important)
- Adds some units and upgrades
- Locked and excluded items can specify quantity
- Key mode (if opt-in, missions require keys to be unlocked on top of their regular regular requirements
- Victory caches - Victory locations can grant multiple items to the multiworld instead of one 
- The generator is more resilient for generator failures as it validates logic for item excludes
- Fixes the following issues:
  - https://github.com/ArchipelagoMW/Archipelago/issues/3531 
  - https://github.com/ArchipelagoMW/Archipelago/issues/3548

worlds/sc2/mission_order/slot_data.py

@@ -0,0 +1,53 @@
+"""
+Houses the data structures representing a mission order in slot data.
+Creating these is handled by the nodes they represent in .nodes.py.
+"""
+
+from __future__ import annotations
+from typing import List, Protocol
+from dataclasses import dataclass
+
+from .entry_rules import SubRuleRuleData
+
+class MissionOrderObjectSlotData(Protocol):
+    entry_rule: SubRuleRuleData
+
+
+@dataclass
+class CampaignSlotData:
+    name: str
+    entry_rule: SubRuleRuleData
+    exits: List[int]
+    layouts: List[LayoutSlotData]
+
+    @staticmethod
+    def legacy(name: str, layouts: List[LayoutSlotData]) -> CampaignSlotData:
+        return CampaignSlotData(name, SubRuleRuleData.empty(), [], layouts)
+
+
+@dataclass
+class LayoutSlotData:
+    name: str
+    entry_rule: SubRuleRuleData
+    exits: List[int]
+    missions: List[List[MissionSlotData]]
+
+    @staticmethod
+    def legacy(name: str, missions: List[List[MissionSlotData]]) -> LayoutSlotData:
+        return LayoutSlotData(name, SubRuleRuleData.empty(), [], missions)
+
+
+@dataclass
+class MissionSlotData:
+    mission_id: int
+    prev_mission_ids: List[int]
+    entry_rule: SubRuleRuleData
+    victory_cache_size: int = 0
+
+    @staticmethod
+    def empty() -> MissionSlotData:
+        return MissionSlotData(-1, [], SubRuleRuleData.empty())
+
+    @staticmethod
+    def legacy(mission_id: int, prev_mission_ids: List[int], entry_rule: SubRuleRuleData) -> MissionSlotData:
+        return MissionSlotData(mission_id, prev_mission_ids, entry_rule)