This PR updates Migration UI to display "next steps" when they are provided by a migration. This works by writing `nextSteps` into the Nx Console meta in `migrations.json`. If the `nextSteps` is missing or it's empty, then nothing will be shown. <img width="1555" alt="Screenshot 2025-04-29 at 5 16 49 PM" src="https://github.com/user-attachments/assets/88491632-9b33-421a-887a-b6fbb5676098" /> See: https://www.loom.com/share/c0a4a7dce9df46b5b023fce5e0a3bd2f