preload_google_ads changelog

v1.0.0 #

Promoted to stable release from pre-release versions after multiple improvements and iterations.
Consolidated and optimized internal architecture for long-term maintainability and scalability.
Finalized and validated all major features:
- Real-time ad status tracking across all supported ad types.
- Stable and consistent ad lifecycle event handling (load, show, fail, click).
- Custom native ad layout support with enhanced UI integration.
- Full ad preloading for Open App, Interstitial, Rewarded, Native (Small/Medium), and Banner formats.
Clean Dart analysis and fully production-ready for Android.
Updated README.md with comprehensive usage samples and support documentation.
Addressed minor bugs and preview issues from previous versions.
Ready for production usage as v1.0.0 milestone.