Add RDPDFReaderPageView as base page view class in SDK:
- Handles all highlight menu interactions and display
- Provides RDPDFReaderPageViewDelegate for menu action callbacks
- Unifies with EPUB architecture: RDEPUBTextContentView pattern
- Reduces code duplication for applications using the SDK
Benefits:
- Reusable menu interaction logic across all PDF apps
- Consistent architecture with EPUB reader
- Single responsibility principle (UI in library, persistence in app)
- Backward compatible (existing code continues to work)
Applications now implement RDPDFReaderPageViewDelegate to:
- Respond to highlight menu actions
- Handle data persistence
- Refresh UI after changes
Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
