fix: tag PAL and AUS files oceania

simple64 picks the PAL PIF for the European and Australian country codes, and New Zealand carts carry one of them. Citra MMJ's AUS font archives serve the region sold in Australia and New Zealand alike. Tagged australia, a leaf New Zealand is not under, --region new-zealand dropped them. They are tagged oceania, as every other PAL file is.

tests/test_region.py

@@ -1094,5 +1094,24 @@ class MegaCdAmericasIsOneCode(unittest.TestCase):
         self.assertEqual(narrow, [])
 
 
+class NoMarketStopsAtAustralia(unittest.TestCase):
+    """simple64 tagged its PAL PIF [europe, australia]. New Zealand is not
+    under australia, so --region new-zealand kept only the NTSC PIF, though
+    New Zealand carts carry the European or Australian PAL codes."""
+
+    def test_no_profile_tags_australia_alone(self):
+        import yaml
+
+        root = Path(__file__).resolve().parents[1]
+        tagged = [
+            f"{path.stem}: {entry.get('name')}"
+            for path in sorted((root / "emulators").glob("*.yml"))
+            for entry in (yaml.safe_load(path.read_text(encoding="utf-8")) or {}).get("files") or []
+            if "australia" in (entry.get("region") or [])
+            and "new-zealand" not in (entry.get("region") or [])
+        ]
+        self.assertEqual(tagged, [])
+
+
 if __name__ == "__main__":
     unittest.main()