Reapply "Merge branch 'main' of https://github.com/GooGuTeam/osu_lazer_api"

This reverts commit 68701dbb1d.

app/router/signalr/hub/__init__.py

@@ -0,0 +1,15 @@
+from __future__ import annotations
+
+from .hub import Hub
+from .metadata import MetadataHub
+from .multiplayer import MultiplayerHub
+from .spectator import SpectatorHub
+
+SpectatorHubs = SpectatorHub()
+MultiplayerHubs = MultiplayerHub()
+MetadataHubs = MetadataHub()
+Hubs: dict[str, Hub] = {
+    "spectator": SpectatorHubs,
+    "multiplayer": MultiplayerHubs,
+    "metadata": MetadataHubs,
+}