fix(ios): build project (#13656)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

- New Features
- Access Tokens screen now shows revealed access tokens, including the
token value where available.

- Chores
  - Updated iOS Paywall package to use Swift tools version 5.9.
  - Removed an unused internal iOS package to streamline the app.
- Aligned access token data model to the latest backend schema for
improved consistency.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/frontend/apps/ios/App/Packages/AffinePaywall/Package.swift

@@ -1,4 +1,4 @@
-// swift-tools-version: 6.2
+// swift-tools-version: 5.9
 // The swift-tools-version declares the minimum version of Swift required to build this package.
 
 import PackageDescription