Refactor ReadingView and bug fixes

[aalberrty]

refactor(reading): migrate to coordinator pattern architecture

• Replace monolithic handler approach with modular coordinators
• Add ReadingViewModel for centralized state management
• Implement GestureCoordinator for gesture handling
• Create PageCoordinator for page navigation
• Add ImageStackView for image display management
• Include ReadingViewExtensions for better organization
• Update ReadingView.swift and ReadingReducer.swift for new architecture

• Update to liquid glass effects introduced in iOS 26 in some views
• Fix [BUG] Scroll does not work when default zoom #406 new bug that breaks scrolling again in iOS 26.