refactor(router): restructure

app/router/v2/__init__.py

@@ -0,0 +1,19 @@
+from __future__ import annotations
+
+from app.signalr import signalr_router as signalr_router
+
+from . import (  # pyright: ignore[reportUnusedImport]  # noqa: F401
+    beatmap,
+    beatmapset,
+    me,
+    misc,
+    relationship,
+    room,
+    score,
+    user,
+)
+from .router import router as api_v2_router
+
+__all__ = [
+    "api_v2_router",
+]