Native iOS (Swift) Support

[stefashkaa]

Feature Title

Native iOS (Swift) Support with SPM Distribution

Description

Parent: #79

Add a native Swift implementation to support iOS apps directly, with behavior aligned to @desource/phone-mask core metadata and formatting rules.

Use Case

iOS-native teams need the same phone formatting/validation logic as web clients and future RN support, without bridging through JS runtime.

Proposed Solution

• Publish a Swift package (SPM) (working name: PhoneMaskKit).
• Core API should include:
  • Format by country
  • Extract raw digits
  • Validate completeness against mask variants
  • Country switching helpers
• Optional UI adapters:
  • UIKit (UITextField integration)
  • SwiftUI example wrapper
• Include cross-platform parity fixtures against core package outputs.

Alternatives Considered

• Wrap web package inside WebView/JS bridge (not ideal for native UX/performance).

Examples from Other Libraries

• https://github.com/marmelroy/PhoneNumberKit
• https://github.com/google/libphonenumber