Make starter bundle a one time purchase

[yoganlava]

Old starter bundle handling code was in the old premium purchase section.
This just moves it to the soft spirit orb purchasing section.
The SKU is passed along as well in order to identify the bundle.

Closes #234

Summary

Describe your changes here. Remove any inapplicable sections.

App changes (app/, etc.):

• Allow sending of bundle SKU to server
• Restore code that selectively pushes the Starter Bundle

Server changes (config/, server/, worker/, etc.):

• Move Starter Bundle verification from the Premium Purchase section to the Spirit Orb purchase section
• Set purchase count for the spirit orb

Testing

Have you have tested your changes in the following scenarios?
Feel free to check off scenarios which don't apply.

• Starting backend services locally with docker compose up succeeds.
• I am able to create a new user and log in locally.
• I am able to complete a practice game locally.
• I am able to complete a purchase of Orbs, etc.