feat: add centralized version management

[hyochan]

Summary

• Added openiap-versions.json for centralized version tracking
• Created version management system that reads from JSON file
• Enables easy version updates across the SDK

Changes

• Add openiap-versions.json with current versions (apple: 1.2.3, gql: 1.0.9)
• Create OpenIapVersion.swift to read versions at runtime
• Update Package.swift to include version file as resource
• Expose version info through OpenIapVersionInfo enum

Usage

// Get current SDK version
let sdkVersion = OpenIapVersionInfo.sdkVersion // "1.2.3"

// Get GraphQL reference version
let gqlVersion = OpenIapVersionInfo.gqlVersion // "1.0.9"

🤖 Generated with Claude Code

[hyochan]

Update: Added automated version synchronization

Changes added:

• bump-version.sh: Now updates openiap-versions.json automatically
• deploy-swift.yml: Added jq installation for JSON processing
• Version sync: Both openiap-versions.json and OpenIapVersion.swift fallback are updated during release

How it works:

1. When releasing a new version via the workflow, it first updates:

   • VERSION file
   • openiap-versions.json (apple version)
   • OpenIapVersion.swift (fallback version)
   • openiap.podspec
   • README.md

2. All version files are committed together before creating the release

This ensures version consistency across all files during the release process.