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/minecraft/__init__.py

@@ -1,5 +1,7 @@
 import os
 import json
+import settings
+import typing
 from base64 import b64encode, b64decode
 from typing import Dict, Any
 
@@ -14,6 +16,22 @@ from .Rules import set_rules
 
 client_version = 9
 
+
+class MinecraftSettings(settings.Group):
+    class ForgeDirectory(settings.OptionalUserFolderPath):
+        pass
+
+    class ReleaseChannel(str):
+        """
+        release channel, currently "release", or "beta"
+        any games played on the "beta" channel have a high likelihood of no longer working on the "release" channel.
+        """
+
+    forge_directory: ForgeDirectory = ForgeDirectory("Minecraft Forge server")
+    max_heap_size: str = "2G"
+    release_channel: ReleaseChannel = ReleaseChannel("release")
+
+
 class MinecraftWebWorld(WebWorld):
     theme = "jungle"
     bug_report_page = "https://github.com/KonoTyran/Minecraft_AP_Randomizer/issues/new?assignees=&labels=bug&template=bug_report.yaml&title=%5BBug%5D%3A+Brief+Description+of+bug+here"
@@ -67,6 +85,7 @@ class MinecraftWorld(World):
     """
     game: str = "Minecraft"
     option_definitions = minecraft_options
+    settings: typing.ClassVar[MinecraftSettings]
     topology_present = True
     web = MinecraftWebWorld()