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/wargroove/__init__.py

@@ -1,6 +1,6 @@
-import os
+import settings
 import string
-import json
+import typing
 
 from BaseClasses import Item, MultiWorld, Region, Location, Entrance, Tutorial, ItemClassification
 from .Items import item_table, faction_table
@@ -11,6 +11,17 @@ from ..AutoWorld import World, WebWorld
 from .Options import wargroove_options
 
 
+class WargrooveSettings(settings.Group):
+    class RootDirectory(settings.UserFolderPath):
+        """
+        Locate the Wargroove root directory on your system.
+        This is used by the Wargroove client, so it knows where to send communication files to
+        """
+        description = "Wargroove root directory"
+
+    root_directory: RootDirectory = RootDirectory("C:/Program Files (x86)/Steam/steamapps/common/Wargroove")
+
+
 class WargrooveWeb(WebWorld):
     tutorials = [Tutorial(
         "Multiworld Setup Guide",
@@ -28,6 +39,7 @@ class WargrooveWorld(World):
     """
 
     option_definitions = wargroove_options
+    settings: typing.ClassVar[WargrooveSettings]
     game = "Wargroove"
     topology_present = True
     data_version = 1