Prepare for App Store release

[oyvinddd]

Given the hassle it is to distribute the app using development credentials (becoming even harder in iOS 16), I have decided I'll put the app on the App Store. Need to discuss Firebase security/general code architecture before we proceed with this.

• Add Apple sign-in (hard requirement for getting the app on the App Store)
• Player creation should happen in a cloud function
• Make teams invite-only (needs logic in backend and in app)
• Remove the possibility for not being part of a team
• Geo fence to Norway only in the App Store
• Research possibility for rate limiting of user requests in Firebase
• Prepare App Store page with screenshots and information
• Add the possibility for registering duo matches
• Add season results based on team (right now it's a global feature)
• Add Crashlytics SDK for crash reporting

[boyum]

Make users invite-only or request to join to avoid overloaded servers.

Also, geo fence to Norway