Start implementing object oriented scaffold for world types

(There's still a lot of work ahead, such as:
registering locations and items to the World, as well as methods to create_item_from_name()
many more method names for various stages
embedding Options into the world type
and many more...)

worlds/AutoWorld.py

@@ -0,0 +1,37 @@
+from BaseClasses import MultiWorld
+
+class AutoWorldRegister(type):
+    world_types = {}
+
+    def __new__(cls, name, bases, dct):
+        new_class = super().__new__(cls, name, bases, dct)
+        if "game" in dct:
+            AutoWorldRegister.world_types[dct["game"]] = new_class
+        return new_class
+
+
+def call_single(world: MultiWorld, method_name: str, player: int):
+    method = getattr(world.worlds[player], method_name)
+    return method(world, player)
+
+
+def call_all(world: MultiWorld, method_name: str):
+    for player in world.player_ids:
+        call_single(world, method_name, player)
+
+
+class World(metaclass=AutoWorldRegister):
+    """A World object encompasses a game's Items, Locations, Rules and additional data or functionality required.
+    A Game should have its own subclass of World in which it defines the required data structures."""
+
+    def __init__(self, player: int):
+        self.player = int
+
+    def generate_basic(self, world: MultiWorld, player: int):
+        pass
+
+    def generate_output(self, world: MultiWorld, player: int):
+        pass
+
+    def create_regions(self, world: MultiWorld, player: int):
+        pass