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

This reverts commit 68701dbb1d.

app/router/__init__.py

@@ -3,3 +3,4 @@ from __future__ import annotations
 from . import me  # pyright: ignore[reportUnusedImport]  # noqa: F401
 from .api_router import router as api_router
 from .auth import router as auth_router
+from .signalr import signalr_router as signalr_router