TLOZ: APworld support (#1884)

- Remove a relative import in Rules.py
- Clean up a few unused imports in __init__.py
- Use pkgutil instead of open when applying base patch
- make sure rom_name is initialized correctly in modify_multidata

* use os.path.join() instead of explicit "/"

worlds/tloz/Rules.py

@@ -1,6 +1,6 @@
 from typing import TYPE_CHECKING
 
-from ..generic.Rules import add_rule
+from worlds.generic.Rules import add_rule
 from .Locations import food_locations, shop_locations
 from .ItemPool import dangerous_weapon_locations
 from .Options import StartingPosition