rewrite (core): Refactor lion* classes.

src/core/settings.py

@@ -0,0 +1,15 @@
+from settings.groups import ModelConfig, SettingDotDict
+
+from .data import CoreData
+
+
+class GuildConfig(ModelConfig):
+    settings = SettingDotDict()
+    _model_settings = set()
+    model = CoreData.Guild
+
+
+class UserConfig(ModelConfig):
+    settings = SettingDotDict()
+    _model_settings = set()
+    model = CoreData.User