The Messenger: Transition Shuffle (#4402)

* The Messenger: transition rando

* remove unused import

* always link both directions for plando when using coupled transitions

* er_type was renamed to randomization_type

* use frozenset for things that shouldn't change

* review suggestions

* do portal and transition shuffle in `connect_entrances`

* remove some unnecessary connections that were causing entrance caching collisions

* add test for strictest possible ER settings

* use unittest.skip on the skipped test, so we don't waste time doing setUp and tearDown

* use the world helpers

* make the plando connection description more verbose

* always add searing crags portal if portal shuffle is disabled

* guarantee an arbitrary number of locations with first connection

* make the constraints more lenient for a bit more variety

worlds/messenger/test/test_entrance_randomization.py

@@ -0,0 +1,19 @@
+import unittest
+
+from . import MessengerTestBase
+
+
+class StrictEntranceRandoTest(MessengerTestBase):
+    """Bare-bones world that tests the strictest possible settings to ensure it doesn't crash"""
+    auto_construct = True
+    options = {
+        "limited_movement": 1,
+        "available_portals": 3,
+        "shuffle_portals": 1,
+        "shuffle_transitions": 1,
+    }
+
+    @unittest.skip
+    def test_all_state_can_reach_everything(self) -> None:
+        """It's not possible to reach everything with these options so skip this test."""
+        pass