Core: Add settings API ("auto settings") for host.yaml (#1871)

* Add settings API ("auto settings") for host.yaml

* settings: no BOM when saving

* settings: fix saving / groups resetting themselves

* settings: fix AutoWorldRegister import

Co-authored-by: el-u <109771707+el-u@users.noreply.github.com>

* Lufia2: settings: clean up imports

* settings: more consistent class naming

* Docs: update world api for settings api refactor

* settings: fix access from World instance

* settings: update migration timeline

* Docs: Apply suggestions from code review

Co-authored-by: Zach Parks <zach@alliware.com>

* Settings: correctly resolve .exe in UserPath and LocalPath

---------

Co-authored-by: el-u <109771707+el-u@users.noreply.github.com>
Co-authored-by: Zach Parks <zach@alliware.com>

worlds/ff1/__init__.py

@@ -1,3 +1,6 @@
+import settings
+import typing
+
 from typing import Dict
 from BaseClasses import Item, Location, MultiWorld, Tutorial, ItemClassification
 from .Items import ItemData, FF1Items, FF1_STARTER_ITEMS, FF1_PROGRESSION_LIST, FF1_BRIDGE
@@ -6,6 +9,10 @@ from .Options import ff1_options
 from ..AutoWorld import World, WebWorld
 
 
+class FF1Settings(settings.Group):
+    display_msgs: bool = True
+
+
 class FF1Web(WebWorld):
     settings_page = "https://finalfantasyrandomizer.com/"
     tutorials = [Tutorial(
@@ -28,6 +35,8 @@ class FF1World(World):
     """
 
     option_definitions = ff1_options
+    settings: typing.ClassVar[FF1Settings]
+    settings_key = "ffr_options"
     game = "Final Fantasy"
     topology_present = False
     data_version = 2