Add backend and frontend skeleton

app/backend/api/v1/__init__.py

@@ -0,0 +1 @@
+"""API v1 package."""

app/backend/api/v1/router.py

@@ -0,0 +1,8 @@
+"""Version 1 API router aggregator."""
+
+from fastapi import APIRouter
+
+from features.auth.router import router as auth_router
+
+router = APIRouter()
+router.include_router(auth_router)