This PR updates the edit prediction onboarding modal with steps about
subscribing to a plan.

When the user is not subscribed to a plan, we display a link to the
account page to sign up for one:

<img width="612" alt="Screenshot 2025-05-09 at 6 04 05 PM"
src="https://github.com/user-attachments/assets/0300194a-c419-43d9-8214-080674d31e12"
/>

If the user is already subscribed to a plan we indicate which plan they
are on and how many edit predictions they get with it:

<img width="616" alt="Screenshot 2025-05-09 at 6 03 16 PM"
src="https://github.com/user-attachments/assets/e2506096-e499-41f2-ba1f-fca768cb48b9"
/>

<img width="595" alt="Screenshot 2025-05-09 at 5 46 18 PM"
src="https://github.com/user-attachments/assets/de82f8c2-cad8-45fb-8988-26606a8dc3e1"
/>

Release Notes:

- N/A