SvelteKit Auth docs for hooks.server.ts are inconsistent

# Improve documentation ## Link https://supabase.com/docs/guides/getting-started/tutorials/with-sveltekit ## Describe the problem The `src/hooks.server.ts` docs are inconsistent, in the user management tutorial it calls `getUser()` before `getSession()`, while in the server-side auth docs it calls `getSession()` before `getUser()`. ## Describe the improvement `getSession()` should be called before `getUser()`, because calling `getUser()` first leads to unnecessary auth server calls. ## Additional context https://supabase.com/docs/guides/auth/server-side/sveltekit