[Sudoku] Added new BK mode game (#910)

Co-authored-by: Hussein Farran <hmfarran@gmail.com>
Co-authored-by: SoldierofOrder <107806872+SoldierofOrder@users.noreply.github.com>

worlds/bk_sudoku/__init__.py

@@ -0,0 +1,33 @@
+from BaseClasses import Tutorial
+from ..AutoWorld import World, WebWorld
+from typing import Dict
+
+
+class Bk_SudokuWebWorld(WebWorld):
+    settings_page = "games/Sudoku/info/en"
+    theme = 'partyTime'
+    tutorials = [
+        Tutorial(
+            tutorial_name='Setup Guide',
+            description='A guide to playing BK Sudoku',
+            language='English',
+            file_name='setup_en.md',
+            link='guide/en',
+            authors=['Jarno']
+        )
+    ]
+
+
+class Bk_SudokuWorld(World):
+    """
+    Play a little Sudoku while you're in BK mode to maybe get some useful hints
+    """
+    game = "Sudoku"
+    web = Bk_SudokuWebWorld()
+
+    item_name_to_id: Dict[str, int] = {}
+    location_name_to_id: Dict[str, int] = {}
+
+    @classmethod
+    def stage_assert_generate(cls, world):
+        raise Exception("BK Sudoku cannot be used for generating worlds, the client can instead connect to any other world")