Release v1.0.3: Major code refactoring and improvements

What's Changed

• Refactored LayoutManager with better type safety and data structures
• Added ShortcutFormatter utility class for consistent shortcut handling
• Simplified AppKitMenuManager and MenuBarContent code
• Improved code organization and reduced complexity
• Added version display in menu
• Enhanced shortcut parsing and display functionality

Changes: 411 insertions, 811 deletions (net -400 lines)

Technical Details

• Better type safety with StoredLayout and CapturedWindow structs
• Centralized shortcut formatting logic
• Cleaner code architecture
• Reduced codebase complexity while adding functionality