feat(cli): TanStack Router beforeLoad auth checks

[moreorover]

Opening an issue as pull request #439 has been closed but I think should be reopened as said functionality is still not present at least on
pnpm create better-t-stack@latest my-better-t-app --frontend tanstack-router --backend hono --runtime node --api trpc --auth better-auth --payments none --database postgres --orm drizzle --db-setup docker --package-manager pnpm --git --web-deploy none --server-deploy none --install --addons biome turborepo --examples none

I have left some comments on PR for further details.