Implement BmcSupporterService to verify supporters via BMC API with configurable caching. Add SupporterEmail and HideIfSupporter properties to all controls to automatically hide donation prompts for existing supporters. Replace PNG logo with SVG for crisp rendering at all scales. Add BmcOptions and BmcConfiguration for library-wide settings. Bump version to 1.1.0.
Create detailed documentation covering installation, quick start, and all three controls (button, QR code, widget). Includes XAML and code-behind examples, property reference tables, theming guide, and platform support information. Adds badges for .NET MAUI 10.0, platform compatibility, and license.
