feat(multiplay): support CreateRoom hub method

app/router/__init__.py

@@ -7,6 +7,7 @@ from . import (  # pyright: ignore[reportUnusedImport]  # noqa: F401
     beatmapset,
     me,
     relationship,
+    room,
     score,
     user,
 )
@@ -14,4 +15,9 @@ from .api_router import router as api_router
 from .auth import router as auth_router
 from .fetcher import fetcher_router as fetcher_router
 
-__all__ = ["api_router", "auth_router", "fetcher_router", "signalr_router"]
+__all__ = [
+    "api_router",
+    "auth_router",
+    "fetcher_router",
+    "signalr_router",
+]