Initial stable release of the AssetFlux Flutter SDK.

Features #

• SDK initialization with project ID and API key validation
• RemoteImage widget for displaying remote assets with automatic density and format selection
• ShimmerPlaceholder widget for animated loading states
• Manifest caching — memory + disk with configurable TTL and ETag support
• Background manifest refresh at configurable intervals
• Gradual rollout — deterministic bucket assignment based on device ID, user ID, or custom identifier
• Offline support — three fallback modes: bundled, placeholder, cacheFirst
• Prefetch API — prefetch single assets, multiple assets, or glob patterns
• Direct URL resolution via resolveAssetUrl() for custom image widgets
• Debug mode with detailed logging and per-asset debug info
• Manifest update listener via manifestNotifier for reactive UI rebuilds