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/test/test_itemgroups.py

@@ -0,0 +1,32 @@
+"""
+Unit tests for item_groups.py
+"""
+
+import unittest
+from ..item import item_groups, item_tables
+
+
+class ItemGroupsUnitTests(unittest.TestCase):
+    def test_all_production_structure_groups_capture_all_units(self) -> None:
+        self.assertCountEqual(
+            item_groups.terran_units,
+            item_groups.barracks_units + item_groups.factory_units + item_groups.starport_units + item_groups.terran_mercenaries
+        )
+        self.assertCountEqual(
+            item_groups.protoss_units,
+            item_groups.gateway_units + item_groups.robo_units + item_groups.stargate_units
+        )
+    
+    def test_terran_original_progressive_group_fully_contained_in_wol_upgrades(self) -> None:
+        for item_name in item_groups.terran_original_progressive_upgrades:
+            self.assertIn(item_tables.item_table[item_name].type, (
+            item_tables.TerranItemType.Progressive, item_tables.TerranItemType.Progressive_2), f"{item_name} is not progressive")
+            self.assertIn(item_name, item_groups.wol_upgrades)
+    
+    def test_all_items_in_stimpack_group_are_stimpacks(self) -> None:
+        for item_name in item_groups.terran_stimpacks:
+            self.assertIn("Stimpack", item_name)
+
+    def test_all_item_group_names_have_a_group_defined(self) -> None:
+        for display_name in item_groups.ItemGroupNames.get_all_group_names():
+            self.assertIn(display_name, item_groups.item_name_groups)