Deprecate old World name using deprecated decorator

Author: HexDecimal

tcod/ecs/__init__.py

@@ -4,12 +4,13 @@
 
 import importlib.metadata
 from collections import defaultdict
-from typing import TypeVar
+from typing import Any, TypeVar
+
+from typing_extensions import deprecated
 
 from tcod.ecs.constants import IsA
 from tcod.ecs.entity import Entity
 from tcod.ecs.registry import Registry
-from tcod.ecs.registry import Registry as World
 
 __all__ = (
     "Entity",
@@ -18,6 +19,17 @@
     "World",
 )
 
+
+@deprecated("Renamed to Registry")
+class World(Registry):
+    """Renamed to Registry."""
+
+    __slots__ = ()
+
+    def __new__(cls, *args: Any, **kwargs: Any) -> Registry:  # type: ignore[misc]  # noqa: ANN401, D102
+        return Registry(*args, **kwargs)
+
+
 try:
     __version__ = importlib.metadata.version("tcod-ecs")
 except importlib.metadata.PackageNotFoundError: