Implement interactive capture zone with barcode filtering

Implement interactive capture zone with barcode filtering

Add a complete capture zone system that allows users to define a rectangular area for focused barcode scanning:

• Interactive capture zone overlay with drag, resize, and corner anchor controls
• Visual toggle icon in top-right corner with enabled/disabled states using alpha transparency
• Real-time barcode filtering - only process barcodes within the capture zone boundaries
• Persistent settings that save zone position, size, and enabled state across app sessions
• Comprehensive capture data filtering - only capture barcodes within the defined zone
• Force portrait mode across entire application for consistent user experience
• Enhanced logging and error handling for capture zone operations

The capture zone provides users with precise control over barcode detection, allowing them to focus on specific areas of the camera view while ignoring barcodes outside the defined region. When enabled, both the real-time preview and final capture results only include barcodes that intersect with the capture zone.