Clean up type hints everywhere, overhaul bot configuration

heidi_config.py

@@ -0,0 +1,19 @@
+from enum import Enum
+
+
+class ConfigSection(Enum):
+    FLAGS = "FLAGS"
+    ENTRANCE_SOUND = "ENTRANCE.SOUND"
+
+
+class FlagsConfigKey(Enum):
+    DISABLE_JOIN_SOUND_IF_ALONE = "disable_join_sound_if_alone"
+
+
+# NOTE: This is the default configuration scheme
+USER_CONFIG_SCHEME: dict[str, list[tuple[str, str]]] = {
+    ConfigSection.FLAGS.value: [
+        (FlagsConfigKey.DISABLE_JOIN_SOUND_IF_ALONE.value, str(True)),
+    ],
+    ConfigSection.ENTRANCE_SOUND.value: [],
+}