Merge: Android ad types, full iOS AdMob support, Tauri deps bump

Consolidates the android-* and ios-support feature branches: - Android: banner (adaptive), interstitial, rewarded, rewarded interstitial - iOS: complete Swift AdMob plugin (SPM + GoogleMobileAds v12) mirroring Android - Tauri deps bumped to latest 2.x (api 2.11.1, cli 2.11.3, tauri 2.11.3) - React and Svelte examples Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>